As long as housing is an investment, there has to be a housing crisis.

100% Agree

I’m not sure how banning landlords works though. Like everybody has to own their own house? What about apartment buildings or people living somewhere for the short-term? Or are you think like where the government is the landlord for everybody - sort of like Vienna?

When you say “doing the former” what specifically do mean?

Empirically, building more housing does lower the cost of rent. See Austin for an example. But yeah there is more that could be done for sure.