Idk, we do live in a bit of a climate emergency so using government policy (not the free market) to discourage density seems like a bad way to achieve that. Also I guess I left out the worst bit of the high cost of living equilibrium. Homelessness has been connected pretty cleanly to high housing costs. It isn't even that surprising, people find moving difficult and even more so when you're at the bottom of the economy just scraping by and then you actually run out of money. There's also a common feeling that forcing people to move is a bad thing. That seems at least reasonable to me.
I think it doesn't really seem like that's the equilibrium. Instead it seems like it causes long commutes. In the bay area huge numbers of people commute into sf from huge distances. It does seem like the situation being different would be better.
