This is a reference to the NIMBY/YIMBY fight, where the YIMBY position is that most non-single-family-home developments, other than the super high end, have been effectively been made illegal through a combination of zoning laws, neighborhood review processes that add extraordinary costs, unreasonable requirements and delays, and other arbitrary veto points.

The best intro points to the argument are probably still https://www.amazon.com/Rent-Too-Damn-High-Matters-ebook/dp/B... or https://www.amazon.com/Golden-Gates-Fighting-Housing-America... although neither is free.