Your assumptions are ugly. There is no possible way for me to know an Audi 6 cylinder (relevant because quiet and fast) is going to come flying around a blind corner when there are huge red stop lights all around it. The only reason I didn't die was because I always am watching the street for cars that aren't paying attention.

Stop comparing to other countries. The usa (especially the south) actively legislates to keep car as king. All of those resources you speak of don't go towards this country's public transportation or self transportation options. Bike lanes are a joke in most big cities. I've watched cars actively try to mess with bikers, run them off the road and such. I won't try to guess their motives. You are naive.