Considering that I've lived most of my life in the States, I would say that I have plenty of experience with how Americans react to things. Most being 40+ years, in five states, and six SMSAs. With three states' worth of driver's licenses to go with my shiny German one. Due to work, I've had the pleasure of working in industrial settings in about 45 states.
A basic rider course is very nominally priced. A rider course that would be comparable to a CDL is not. Last time I looked at CDL schools, a course was running around $3500, comparable to a week of Superbike school or Skip Barber for the car peeps. It's almost twice what I paid for my German license. Name me one soccer mom who is going to pony up that kind of bread, time and hassle to drive an SUV.
So, which slippery slope did you pick, anyway?