You are apparently unaware of the huge stolen car market where "used" cars are shipped overseas from the USA, typically to Africa.
This must be the reason why we drive on the other side in the UK:
Shady Dude "Hey guy, wanna new car? Cheap, low mileage."
Me "I could do with a four-door, lets take a look."
Shady Dude "Lay your eyes on this smoooooth set of wheels kid, slide on in and try it on for size."
Me *Gets in passenger side of a US vehicle* "The steering wheel is on the wrong side you joke."