On the other hand: if you own property, you could take a loan out in order to turn your single family home into a rent-collecting multi-unit house. That’s what people did all the time before zoning laws, and it’s a reasonable way for a retiree to earn an income.
The problem is the zoning laws: we don’t allow people to let out part of their property, so they’re forced either to attempt to downsize into a non-existent market, or get evicted for not being able to afford their taxes.