I’ll jump in and offer my (uninformed) opinion. It seems that housing is seen as more of an investment. Developers build higher end houses rather than lower income housing because the profit margins are higher. In this context, reducing the value of housing as an investment by making it harder for owning multiple properties while making it easier for people to own one house could go a long ways to settling out the cost of housing in the mid to long term simply by changing the incentives on what to build.
Short term, just getting some housing supply out of short term rentals and absentee investors hands could put some more housing on the market now.
Is it enough? I doubt it, but we can do more than one thing.