Approximately 8.6% of US households do not own a single car, as of 2017. Only 76.4% of commuters commute via single-occupancy vehicles; another 8.9% commute via carpool. These statistics are nationwide. Your claim that "95% of Americans truly can't live without a car" is contradicted by the fact that more than 5% do not own a car in the first place.
It's true that living in, say, Rantoul, Illinois is going to be difficult without a car. But the list of cities that have at least some form of bus service does go down to some pretty small cities (<100,000), and most of the country anyways lives in large cities or their suburbs, where transit is viable.
It's true that living in, say, Rantoul, Illinois is going to be difficult without a car. But the list of cities that have at least some form of bus service does go down to some pretty small cities (<100,000), and most of the country anyways lives in large cities or their suburbs, where transit is viable.