Apple replaced a friends phone that they abused and then made up a story about. Apple did this because Apple wanted to take care of their customer. Doesn't mean Apple is obligated to replace every phone, even when it is abused. Apple's only obligated to the terms of the warranty it promises. Apple promises little, but delivers a lot.
These are the incidents that test the true nature of a company. AirBnB is not coming off very well so far, and there is no negative ramification to doing the right thing-- except for the direct costs of doing the right thing.
If AirBnB thinks leaving their customer hanging is worth saving the money it would cost to "make things right" (Whatever that means) it is their right.
But lets not hide behind the spurious notion that the world operates like school.
Just because you give some gum to your friend doesn't mean you're obligated to give it to the whole class.
If it did, then I'd have the right to go to a party at the playboy mansion! Clearly other people were invited.