There a massive gap between “all cars should be banned”, which you seem to be replying to, and “some urban areas should be allowed to densify and operate without cars if their citizens want that”.
That's true but it seems like the people advocating for policy on both ends don't understand the difference in density and therefore transportation needs between Boston and Boise. Everyone wants policy to be a state or federal level cudgel these days and quite frankly that is stupid.