While I agree that building housing is a better solution, it's hardly trivial. It's very capital intensive and in a lot of cases no one is willing to put that kind of capital up. Turn detached single family homes into denser townhouses? GOod luck. Turning industrial land into high rises is easy enough but that doesn't really cover the entire spectrum of housing types. What cities in the Bay Area really need to do is tear down 60's suburbs and rebuild as if they were 1860's London.

But that's not going to happen.