Because renting != hotel. There is a huge different between how a tourist treats a building/apartment/neighborhood and a resident does. There are many good reasons why hotels have regulations. Mini-hotel platforms are not subject to the same things.
The guests do, though, which means when you call the cops again next week, it's a new person getting their first noise warning.
Nor do they really want to do all that work - evictions cost money, and are hard! - just to have another AirBnBer sign the replacement lease.