(If it turns out it was the city's fault that Airbnb erroneously thought the registration was invalid, that'd clearly be an implementation failure, I agree, but still leaves open the question why Airbnb only reacted so late)
As opposed to a rigid system of "designated uses" for private properties that prevents economic transactions depending on how much they inconvenience upper class and politically connected residents and competing hospitality interests.
Edit to add:
And by regulating local externalities at the local building level rather than the city level, you are more likely to have better regulations in regards to residents and owners wishes.
It's sad to get to this point but nobody was going to do anything and I was no way willing to deal with that situation. One tourist even pissed in the elevator.
The situation was just not tolerable.
One star - Neighbors will beat you with a baseball bat if you have a late night party.