alt Hacker NewsIn China it's a matter of politics rather than financial sense, of unifying the country hence why they have them in ethnic minority areas too. The trains would be like roads, sure, most people wouldn't take them from one end to the other, A to Z, but there are enough people to take them from A to D, J to N, Q to T, so to speak. If one could commute in one hour from Boston to DC for example each way, daily without flying, it opens up more economic opportunities in total. But like PG said, the competition to an airline isn't a car or a plane, it's Zoom.
Yes, I can see how some people might think the same system would work in the US too, with a HSR network going from Boston to LA, with stops along the way in NYC, Chicago, Louisville, St. Louis, Denver, and maybe some smaller cities too.
But China has a much larger population than the US, by far, and an authoritarian government that has no problem using the "build it and they will come" business model for large infrastructure projects that may or may not work out as planned and no worry about opposition from local politicians, NIMBYs, etc. Don't forget, most of their population is concentrated on the east coast; the inland areas are relatively unpopulated. And they don't have a population that's been conditioned from birth, ever since the 1940s, to think that automobiles are the mode of transit that society should be based around.
So even if they did build an HSR network across the US, I don't think it would work out. How much travel is there between Denver and St Louis, really? A lot of the intra-US travel is really between places on opposite coasts, or on the same coast, because that's where the population is.