In addition to the two advantages you’ve already covered, Americans regularly travel between points without sufficient density to support frequent and convenient public transit.
While we fucked around for a decade the CPC built out a high speed rail network on the mainland. Similar landmass, similar geographical challenges, less wealthy nation. Guess Americans will have to wait until public transit is more profitable than making everyone get their own car with its very own JARVIS.
You could slowly do it over decades in places primed for growth. Places like Arlington, Va are being urbanized.
I’d love automation of public transportation, but nobody wants to try because of the social hurdles.