To me the question is whether the result of what you’re doing makes the world around you better or worse. Would the people living in your place be better off if you were out of the equation? Then you’re a bad landlord.

If you’re making money from providing labor for the people who live in a place you own, and they’re paying your costs to do so, I think there’s a case for that being a reasonable occupation to hold. If there’s an issue with it, it’s not my highest priority, and there’s definitely some value in flexible housing stock for people.

If your goal is passive income, or you’re making money from owning housing and denying that ownership to people who need a place to live, then you’re behaving as a parasite, and I think it’s reasonable for people to give you an amount of respect proportional to that.