And most hotels have centralized departments for dealing with it, contacts with extermination agencies, and a single large building to treat, and a very very strong incentive to get it done immediately, lest they lose all business and be forced to shut down.

I obviously don't know the specifics but I'd bet Hilton is a million times more effective at pest management than some 60 year old dude who put up his second home for extra income. To whom does the cost of extermination act as a large deterrent?

FYI, Hilton does not own or operate 99% of hotels with their brand name on it. Quality of management will vary greatly, but I agree that the probability of hotel management fixing the issue quicker is higher than an Airbnb operator.