If California had actually gotten a bullet train there might be some precedent in the U.S. to show support for it. :(
As of right now, transit in the U.S. is barren. People cannot take off multiple weeks of work just to reach their destination - when they do it's usually the goal to drive over taking the train since they take and cost about the same amount of money. Especially if you are trying to visit cross country, you may not even have a direct train route to where you're going. Like, it's basically Amtrak or Bust.
It took 16 hours (2 trains and 1 bus) to get to the southern part of my state to visit a friend, and it was more expensive and slower and far more exhausting than a plane flight. We only did it because we wanted to travel in-state with cannabis for 4/20.
It also is far easier to get screwed. I've had busses not arrive, train delays and the bus leaves and there's no refunds, good luck calling one of their centers to try and get any help at all. It's awful. Systemic issues for rails I guess, or airlines just care more about customer service. I've had a lot of good experiences on long trains, but I've also had some really awful ones. We need more Inner City rail systems though for sure.