>If I could get around by bus, light rail, bike, and all of the wasted city space devoted to parking could be turned into more housing and amenities, that would be great.
I guess it depends on where we're talking about. The majority of the US is not inside a city. So just diverting all resources into public transportation is only serving the metros.
If we're talking about a small country then sure.
> The majority of the US is not inside a city.
I think this isn't true for the US any more, maybe it hasn't been true for decades?
WorldBank seems to have the ubranisation rate at around 80% for the US: https://data.worldbank.org/indicator/SP.URB.TOTL.IN.ZS?locat...
There is a bit of a definitional problem, with people living in suburbs identifying as rural, as do folks in exurbs. I don't think they're considered rural, and they're concentrated enough that well-designed public transit could serve them quite well. A decent public transit system means that families in sub/exurbs can go from 2 cars to 1 car without a major drop in quality of life, but they'd save $5k - $10k per year.