Back when I was a renter mine just created slums and maintained misery, but maybe he was special.

I've had slumlord landlords, landlords who maintained and kept up the property and focused on retaining tenants over increasing rents, and corporate landlords with prices set by a computer. Landlords are a spectrum.

I guess not most, all of mine were fine, mostly individuals with one or two investment properties who were friendly neighbors I happened to pay rent to.

Point is, in choosing to be a landlord and buying property, an ideal world would respond to this demand pressure by building housing, didn't mean to suggest the landlords themselves put on their hard hats and frame a new building. Just that they're also part of the marketplace.