The Bay Area's population has grown by 8.5% in the last 10 years. [0] Please, that's not "Manhattan". That's one person on your block converting their garage into a rentable unit.
Those "existing homeowners" are really messing things up for everyone because they don't want Bob to turn his garage into a rental? Somehow I think there's more to it than that.
[0]: https://www.kqed.org/news/11741275/map-the-bay-area-leads-ca...