I agree there are too many slumlords and abusers of the system but It's not always in someone's interest to buy.

I would never move to a new city and buy without living there for a year and assessing the areas. College students aren't going to buy a house to go to school for a few years. People who have catastrophic damages at their homes need to rent somewhere while repairs happen (insurance pays for the rental). Safety concerns with a spouse or live in partner creating the need to move out and rent.

Your blanket statement is asinine.

Obligatory, not a landlord