At first you have to keep on mind that, Bitcoin is related with technology. Need proper knowledge about technology. In rich country all latest facilities available there. They have proper knowledge about bitcoin. So all facilities available there. They can contribute in any latest facilities. Instead of rich,  I could list a few countries that you would consider as third world country ,have no ATMs, no exchanges and still have more bitcoiners then some of the countries you listed. In other words, the ATMs don't represent the user base at all.