Right, but blaming "wealthy liberals" as the headline suggests seems to miss the point. I think this has less to do with wealthy people or hypocrisy in politically liberal people, and more to do with the fact that everyone is blue in SF, even the conservatives. The author seems to be pointing at naturally conservative people and going "you voted democrat, why aren't you living up to progressive values?".

Maybe there is a faction that are hypocritical about this for local issues, but is that actually the main driving force behind the housing crisis? It seems to me that there's a lot more actual conservatives in SF than maybe the voter party registration gives credit for, and blue SF politicians know that they have to represent those people as well.

They're not conservatives by the usual definition. If you want to say, "well on this issue they're actually behaving in a very conservative fashion" I'll agree with you; nevertheless, by the usual standards of conservative and liberal/progressive, they're voting very liberal at least for state and national-level issues.