I mean would you rather have RVs or tents on sidewalks?

Many of those in lower quality housing have jobs. The service workers and whatnot in every community have to live somewhere.

that has zero realistic chance of happening in the US. Even repealing the Faircloth amendment that limits public housing stock is not broadly popular.

And these days all housing providers, whether for-profit, non-profit, or public, are running into the same issues with zoning, financing, rising costs, etc.