This is not the case in SF. Developers want to build, but entrenched interests fight and delay, often using the rhetoric that doing so only makes developers richer and the only reason developers want to develop is so the developers themselves make money (as if this is some kind of purity test of intent).
As much as I hate giving NIMBYs any credit, it's important to remember that developers don't want to lower the price of housing - they want to make money, but the higher the cost of housing the more profit they make.
For instance, suppose they build 100 apartments in the suburb of X. They know that for every $1k the price of housing in X drops, they lose $100k. So weirdly, they tend to leave housing vacant and sell it at a drip-feed so that they're always selling less houses than there are buyers - there is a huge difference between selling 3 apartments to 4 buyers, vs selling 4 apartments to 4 buyers. This particularly bad when there are few, large developers instead of lots of small developers, as the few large developers can collude to price-fix much easier.
Please don't interpret this as contradicting the fact that California needs to massively overhaul its zoning/construction permit system - the fact that it can take years to receive permission instead of weeks is a big reason for the price of housing (and raises capex requirements which results in fewer but larger developers, see previous paragraph). Ditto for all the zoning that mandates exclusively single-family homes, and other such pointless exclusionism.
Yeah, developers acting in their own interests isn't going to magically fix everything - there's no shortage of examples of how "chart goes up forever" thinking leads to nasty externalities and tends to run into a brick wall at some point, and how manipulative the big players in the real-estate market can be.
But painting NIMBYism in such reductionist (and long-term economic-investment backward) as "development would make real estate investors and developers lose money" would just result in people fighting entirely the wrong battles with entirely the wrong message to actually have a chance at changing things in a useful way.
