How does any of that help when the real issue is the distorting effect of prop 13 on the market? Insane housing prices are being driven by an illiquid market, adding more housing isn't going to change that.
And overturning it for commercial real estate won't do much to help housing prices, except for any re-zoning that happens. Overturning prop 13 or amending it might not happen for 5+ years, if ever. Note: https://www.bizjournals.com/sanjose/news/2017/07/19/californ...
Over the short, medium, and long-term then, building more is the only choice (SB 35, AB 71). Since you see prices not increasing as much in other parts of the state, it means building more can in fact keep prices down, as the deep-east bay construction shows.
This is what all the economic literature on the subject says.
Of course, it may not seem like you're making a dent, because housing has been so badly undersupplied there for so long.
I can guarantee you that if you built a million apartments, then prices would go down.