You do realize that not every land lord is some rich guy with no expenses, right? That is absurdly short sighted and based on some ridiculous "eat the rich" nonsense with no concern for who you're actually screwing.
It's incredibly common for middle income families to move and rent out their old house instead of selling it, and now they're being completely fucked over because you think you're just robbing some rich guy.
Also, not everybody wants to own the house they live in. People move all the goddamn time and don't want to buy a new house every time they do. Buying your house doesn't become a good deal unless you live in it for at least several years.
Lol at "more available for actual ownership". You think it's going to be banks and corporations that lose when houses get foreclosed? Is that who lost big during the last big foreclosure in 2008?