I don’t think it’s fundamentally a bad thing. It has its place. But it’s an industry that’s easily exploited - I rented over a dozen places and like 80% would try to do things that the tenant handbook would not allow. I sued one of them, and settled out of court for another. And surprise surprise a lot of them don’t want to rent in areas that are pro-tenant rights.

Right, it's entirely possible that landlording in practice has so many opportunities for abuse that it's irredeemable despite its potential for benefit in certain cases. I don't know if I agree with that, but at least it's more intelligent than "Marx says landlords bad therefore landlords bad."