Can you imagine of all the Formula one drivers had to pass a racing test for each country they race in and re do a currency test for wet days and dry days and cold days or windy days ...? Or each Soldier had to pass a medical for each country they operate in and undergo firearms training in each country they visit... Madness....... Well wouldnt want our troops trained in American ways so scratch that last comment .....
Or some parts of the world who put their driving wheel on the other side of the car ? Imagine they would drive also on the other side of the road!!
I don't have a feeling that your statements make any sense, the world isn't (fortunately) one country.