The fastest growing region in the United States is the South. Of the top 10 fastest growing states in 2019...only 2 of them voted blue in 2016. California is growing at its slowest rate in history:
Yes, supply and demand drive prices, but if you artificially constrict supply like California does with absurdly restrictive zoning laws and inflexible housing policies that only act to protect inflationary ponzi scheme, then you get the present-day California real estate market bubble.