The real issue with CA real estate is prop 13. It directly disincentivizes selling your home as you would be paying significantly higher taxes on the same house (same value etc) somewhere else.
So if you do own a home, you’re much better off keeping it and renting it out rather than putting it on the market. The only thing stopping one from doing that is needing the home value itself as the down payment for their next residence. But even that can be avoided by getting a line of credit on your original house.
If you want to fix CA real estate, scrap prop 13, force granny to sell and move to the boonies (to avoid the massively ratcheted property tax she will now be paying), and you’ll have a massive supply of homes for sale.