to be fair the US is a relatively small economy that doesn't have resources to pull this off once you subtract the money needed to topple elected governments and bomb brown kids overseas, while militarizing the police to crack down on the melanin epidemic in house.
And realistically, there are no good reasons America couldn't have a decent high speed rail system across the eastern seaboard and maybe the western seaboard with a couple connecting links between them where the population supports it.
The US can't even build high speed rail from LA to San Francisco, and they're no closer to even starting it than they were when they started talking about it 20 years ago. It's cooked.