> High rents are created by high local productivity.
Wrong. High rents have many reasons and also good policies to get them down and have affordable housing for more people, also in otherwise expensive and popular cities.
Nope.
Rents cannot (at meaningful scale) exceed local productivity, or else there will be widespread vacancies and landlords will reduce their rents.
Rents cannot (at meaningful scale) fall below local productivity, or else landlords will simply raise their rents.
Go talk to a landlord about how they site prices.
Step 1. Look up income of your target demographic
Step 2. Eat 30% of their income
Can you show me a place with high local productivity and low rent?
Can you show me a place with high rent and low local productivity (that's not e.g. a vacation destination for people with high productivity elsewhere)?
You can certainly artificially suppress prices with rent control. But that just gets fed back into the system in the form of reduced supply, so it ends up raising rents on the non-controlled housing stock anyway.
OP has the demand part of the equation if supply remains fixed. The reason supply remains fixed is the US as a whole made policy changes in the 1970s that slowed down construction, specifically zoning laws and environmental laws swept the country. The 2008 recession also cancelled what little construction remained ongoing for a long time.
When you combine that with spiking wealth in Silicon Valley, you’ve got the perfect storm in Silicon Valley. With OpenAI and Anthropic both based in SF, it’s going to be worse than ever once they IPO.