Which regulations are you thinking of in your first sentence? In my view the limitation on use of residential units as hotel units simply recognizes the externa

Which regulations are you thinking of in your first sentence? In my view the limitation on use of residential units as hotel units simply recognizes the externalities involved - externalities that Airbnb hosts are now throwing into the commons and profiting from. Other regulations, like more stringent fire codes for hotels, signage to fire escapes, sprinkler systems etc. are paid for with blood, not lobbyists. You may have other regulations in mind though, that I don't know about.