The only thing I'm presupposing is that more people want to live there, than the area can fit. Maybe too many even if they built lots of high density housing, w

The only thing I'm presupposing is that more people want to live there, than the area can fit. Maybe too many even if they built lots of high density housing, which SF won't allow anyway. It won't happen on a purely group vs. group basis, that's just a simplification for the purpose of forty-word internet comments.