I believe in a world in which housing is a public good and a human right, so that no one would have to rent from anyone else in order to have access to housing. In this world, housing would cease to be a profitable investment vehicle, and thus landlordism would no longer exist.

Could I "enter in a contract" to lease "land that I own" in a national park? No, because national parks are a public good that everyone shares in their ownership and right to access. Housing should be the same way.