Because unlike in the US, most of the world's unvaccinated have not had a chance to be vaccinated yet. It is not their decision.
Even better by those who don't want to be vaccinated they free up the available supply to those who do. Outside the ethical question of forced vaccination or anything medically forced there is also the logical question of let's not worry about those who might choose for their own reasons not to be vaccinated and instead continue to work towards vaccinating everyone who does want to.
Which varient?
It has been observed people who had one varient, for example Alpha, are now catching Delta which suggests you'd need to catch multiple if not all variants to have a broad specrum immunity - last one I heared about was Lambada which might mean you need to catch it 12 times to get the same wide spectrum coverage as a vaccine can give you. You are correct vaccines are not 100% which is why we must partake of mask wearing and social distancing while the embers of the pandemic still glow, but even when they are not totally effective against a certain variant they are shown to be partially effective while still keeping a lid on the others, and they can be modified to complete their coverage such as is happening with the AZ and Beta varient right now.
And while we're talking about it, how long does naturally aquired immunity last? It isn't infinate, people have been reinfected by the same varient within months of recovering from a first infection... With a vaccine when it becomes apparent to science that immunity is wearing off, a booster can be applied and immunity reinforced especially if the virus has mutated in that time and side-stepped the previous naturally aquired immunity, hence the 'Flu vaccine drive every year... For naturally aquired COVID, you just have to wait until you catch it again I assume?
And what of catching COVID naturally? We have heared headlines about rare side effects of vaccines, but "rare" is the crux of that sentence and once side efects are know they can be monitored for. The same number of people are still getting blood clotting from the AZ and J&J vaccines, but now we know about it the number of people dying from it has become minimal because it is survivable if detected and treated which is happening right now -
Sort of. There seems has also been observed and in many ways expected a diminished severity with the variant infections. It's also the same result with several of the vaccines (RNA ones seem to manage better against variants which is rather exciting for the future of vaccine research and the future of viral infections in general) So while they might not have as fast of an immune response to varients as those who have the RNA vaccine they still have a sufficient response and have a similar reaction as they would to the many varients of Influenza which while killing 60k a year in the USA is, for the most part, ignored and people show up to work and school clearly sick. While a flu shot is offered yearly in the USA there are still a lot who simply don't get one and even those who do find its yearly effectiveness questionable (this is what's so exciting about RNA solutions, as we no longer have to pick the variant we think will be prevalent for a general region but can pick a common binding site for all varients we are seeing in the wild).
It is still unknown how long the memory cells and T helper cells retain patterns for activation on the covid virus and even with these antibodies for the covid it's not like immunity prevents you from being infected, it just speeds up the immune reaction to the virus and thus a smaller window of virus and immune response damage is incurred and the body is less impacted.
whereas with COVID-19 there is a 3% chance of dying which climbs to 10% and more as you get older until the point if it's prevelent in the area it's the main cause for deaths over a certain age group in the unvaccinated... but not in the vaccinated. The vaccines have been shown to segnificantly reduce the number of prople dying from this virus, even in the elderly who may have had a 50%+ risk before.
No, it's 3% overall and that number has been questioned as being to high. The breakdown by age shows that the risk is almost non-existent in those under 20 and those over the age of 65 accounts for 81% of the deaths. (I believe I posted graphs showing the age impact on deaths and how the yearly death totals compared to previous years)
And beyond just dying, there is a 40% chance of Long COVID no matter what age you are as shown in a recent study of 19 to 49 year olds who have the same previlence as the over 50's, which can cause permanent internal organ like lung scarring and even brain damage which you will have to run the gauntlet of suffering each and every time you catch COVID naturally, which may be once a year, for the rest of your life. 40% is practically a 1 in 2 chance. You feelin' lucky?
I have not come across any sort of percent chance of long-term effects from the covid infection. But like any cold, the lingering impact of the infection will be based upon the immune response the virus load, and any underlying medical conditions. High fevers have always had a negative impact on the brain which is why drinking plenty of water and taking a fervor reducer is common practice. It's the same impact things like heat stroke have and its impact is more permanent than other effects of the infection. Most of the other side effects are common of severe infections and were also seen in colds like H1N1. Most of the effects are gone by 4 to 6 weeks after infection with some of the lung effects taking upwards of 6 months (similar to the amount of time it takes for the lungs to heal after smoking). But studies are showing a direct correlation between the severity of the cold the physical shape of the individual and the length of recovery. Those being in shape and or having a faster immune response to the infection have had a quick recovery. One has to factor in that a vast majority of the world's population is out of shape and overweight.
Just as with the Bubonic Plague, thereputics will come along which will make a diagnosis go from a potentially life threatening condition to a course of COV-be-gon or whatever brand name they come up with for it. How many people die between now and then is entirely down to what we as the citizens of the world are willing to do to keep ourselves and each other safe right now. Vaccination is one part of a raft of measures which have to be taken and it is by far the most potent tool in the kit - rather than passive measures it is the first that takes the fight to the cellular level and equips your body with a weapon to strike back with rather than a defence to hide behind and prey it doesn't breech. Masks. Social Distancing. These things are to stop it from getting to you. Vaccination is being handed a cricket bat while the zombies are hammering on the door and being told you must remove the head or distroy the brain (sean of the dead reference there). Other stuff that'll help I'm sure we'll realise sooner or later too but until that point don't be a pacifist about this. Tool up and take the fight to the pathogen and buy our species time to find the theraputics which will put a bullet in COVID-19 for good.
I would not compare the Bubonic Plague to Covid as there is a world of difference between the lethality of them. Covid as scary as it has been to so many is just a slightly elevated cold when compared to true plagues like Bubonic and even things like smallpox, measles, black death, yellow fever, polio, Spanish flu. Even Aids has killed more than 35 million vs 4 million for covid.
Oh, I am all for vaccines even when one of my daughters started having seizures after her first round of immunizations at 1 year old. While it's hard to say the vaccines caused the seizures and delayed talking or triggered an underlining genetic mutation or had no correlation to the seizures and was nearly a coincidence we may never know. Even still I feel this risk was far better than the possibility of her getting any of the diseases it's crafted to protect them against. My issue is not with the crafting of the vaccine or the offering and highlighting the many advantages of the vaccine (should always be fully transparent and include the risk factors, not lying by omission) but when we step over the line and start demanding people do something to their body. As a society, we have been very vocal advocates of my body my choice and whenever that has been crossed even in the pretense of doing good has always lead to horrific acts of brutality.
And I will say it again. There is no eliminating Covid or its many variants like Covid19 even if the whole world was fully vaccinated with a 100% effective vaccine the virus will come back with a novel strain and reinfect people. It's in the animal population like so many other viruses. We need to get over our fear and move on. Yes, it was scary and yes it's a great wake-up call but it really was not even close to the plagues of yore and we should be thankful. We should also be excited by the reality that our fear leads to a new kind of vaccine which has the potential to cure a lot of ailments. In some ways, it's always entertaining how fear drives huge jumps in technology.