AirBnBs are effectively only viable for large-scale industry in tourist hotspots.If you think landlords would en masse turn to AirBNBs, which represent a far far less stable source of income, if they were stopped charging inordinately high unaffordable rents, then you're living in the clouds.
Some picturesque towns and villages are almost terrifying when you look at the houses and see pretty much every second one has one of those key-safes indicating a rental. Then bear in mind a load of the others don't have a permanent resident much of the year, just the owners prefer to not have strangers in their house when they aren't there. These places are almost zombie villages in a sense: barely any permanent residents, and the few left gradually driven out by exorbitant prices.
A place like Padstow has a large, ugly, modern housing estate on the outskirts of town. The locals live in the housing estate. What used to be the town, the old building and harbourfront, is just rentals, second homes, and a handful of the affluent. In North Yorkshire, you can see notices that houses (usually still rentals, and usually uglier new builds in less favourable locations) are restricted to the locals, otherwise the town would collapse because no-one would be left to staff the shops, pubs, hotels and other basic functions.