You’re not wrong, but that’s not going to work over the entire country. There’s just too much space to cover; the country would go bankrupt trying to provide mass transit everywhere that it’s needed. So while this could be, if you could convince people to actually do it, a solution in urban areas, it’s never going to work out in the thousands of miles of country and they have the exact same problems. They just have less traffic and more empty space to cross.