The rent is too high because of zoning laws.
we've built a ton of structures with existing zoning laws when the economy is good, more than we've built during this deregulation paradigm. we stop when the economy or market is bad. very simple concept.
There's also the other turd in California real estate policy: Prop 13.
there would be more supply if not for restrictive zoning laws. and more supply = lower prices
How many are homeless?
What does the median worker spend in money and time commuting from somewhere further?
(See what I did there?)