Americans have been taught that railroads suck, Amtrak sucks, to the benefit of personal cars and airplanes. In the exposay do entary, Who Killed Roger Rabbit, we learned how GM killed So Cal light rail so it could sell more cars.
America is too big for, eg, coast-to-coast, passenger traffic, but there are regions, like DAL-HOU-AUS-SA, that could be very well served by high-speed traffic, but Southwest Airlines bought enough corrupt TX politicians to kill Texas's TGV.
corporations, they've ed us over enough, long ago.