Zoning reform is the cure, if we want 15 min cities. The market will do the work, if you let it. Plus, many problems are just housing problems in disguise (including homelessness). Rhetoric I see here about banning cars is both redundant and ridiculous. If people have more convenient options, they won't use cars anyway. If you deign to "ban" cars without a replacement people accept and find convenient, not only does that not help anyone, it will be ignored and cast off as fanaticism.
Granted as climate is an issue we want to address in the short-run, that can demand some imperative policy moves to encourage a faster transition. Still need zoning reform first though. Anything resembling "degrowth", however, will just make peoples lives worse in the developing world and here.