Earlier quoted context omitted.
"Having no car at all should be viable and we should build toward that." Yeah its sounds great until you need mass transport system to support this idea which means only mega cities can benefit the most when tier 2 and tier 3 cities is having a hard time investment see: japan
See: the Netherlands. Or Switzerland, for counterexamples. If anything, properly built small cities and towns are actually even better for public transit, since they're small. You don't need to cover a lot of ground. Heck, everyone talks about self-driving taxis. Self-driving trains and buses, that's where it's at, actually. A decent chunk of the cost (and limitations) for public transit is the need for human drivers…
Agreed, with the caveat that everything is crazy expensive now so smaller cities struggle to afford to build even a small amount of rail. We had excellent public transport in the 1900s, it was torn up for the automotive revolution, and now we can't afford to put even a 10th of it back. We struggle to put an extra station into an existing line, let alone new lines.
One of the big issues is that property is so expensive in the modern west that buying up the land to build is prohibitively expensive. The old game of private rail companies making money off property around public transit stops isn't working here at least, because property is already so unaffordable, there's no room for price growth.