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.