The sad truth is the USA spends ~$150B/year building and maintaining it's road network (to say nothing of the inflation-adjusted costs that went into its initial roll-out). Source: The US Fed tracks it directly - https://fred.stlouisfed.org/series/TLHWYCONS
That's a $41/month subscription every citizen's paying no matter what. When we're pulling cash on that volume from everyone's pockets to build lavish infrastructure literally up to people's doors (vastly more road square footage than housing+school square footage combined), of course folks are going to say "nothing compares" -- because nothing does compare. Which stinks (imagine if we'd focused a century of spending on rail at rates like that; damn), but it is what we have at the moment.
Seems like a bargain by comparison! Chicago is about to spend $1 billion/mile to extend an above-ground train line: https://en.wikipedia.org/wiki/Red_Line_Extension
The USA is riding on 100 years of the benefits of scale and economic investment. If the USA was investing $150B a year into building passenger rail, we would not be paying $1B/mile for "new" and "trailblazing" rail projects. If we had to build much of the highway infra we built 75 years ago, but do it now, we'd be paying similar $1B/mile prices for the highways.
The best thing about rail in the US is we'll have a lot of premium land for bike paths and AV lanes when the rail gets decommissioned.