The problem is there are more instances of people who own places just to rent. Ban those. But permit people to rent places they actually have established residency in.
As an example… Boyfriends and girlfriends with their own places but spending the night swapping between are also super inefficient usage of resources. I’m obviously not suggesting that couples must live together… But they’re perfect for occasional Airbnb rentals. Rent it for the week and spend that week at your partners. Same with people who travel for work.