Your assuming everyone wants to own property over renting.
House and property ownership has a lot of responsibility and expenses involved. Your water heater breaks well there is $1000+ your roof needs replacing there is 30K. All of that goes away when you rent as it isn’t your responsibility.
If you own property it can be harder and more risky to relocate. I know a few people that bought in 2007 and then were stuck as they couldn’t afford to move because they were upsidedown on their house.
Not saying renting is all sunshine and roses. I personally would rather own then rent but home ownership isn’t for everyone.
But I do think it is a major problem when you have a few companies buying up all property so no one else can afford it. But I don’t think being a Landlord is inherently evil.