[Schiendelman]

I think if you drill down you'll find there's no "they" who can. The majority of voters are homeowners who benefit from restricting housing supply. Any state actor who loosens land use regulation enough that it actually lowers housing prices would likely be voted out.

The changes you see - like allowing ADUs - are inherently very limited impact so that they look good to those advocating for more housing without actually lowering prices.