Confused: are the houses empty? No? Then they've had no impact on a housing crisis.
It's as much about prices as it is about quantity. The houses and rental units are there, they're just really expensive as a % of income.
Are there are a lot of practical problems with a world that truly has no landlords? Of course. But it does you no good to make stuff up about a school of thought you clearly know nothing about and have never attempted to engage with.