The parent comment is proposing a system where nobody is punished, everything is deferred. Not all landlords are fat cats in a mansion, if you remove the flow of cash to only some people, those people will be crushed if they depend on that flow to send it further upstream.
I mean, by definition, landlords own more homes than they need. Worst case scenario, the asset doesn't disappear, it just gets put to auction for someone that can afford it to buy it.
Possibly the government could restrict that auction to non-property owners to help sort out the first-sentence problem.