@Jill932 I don't see how this is host Ken's fault, nor Airbnb's fault....
You don't know if this is a regular occurrence; maybe you were unlucky & Ken's neighbors had never disturbed other guests? - If they do this regularly, it will no doubt feature in reviews, so why book a place where other guests report noisy neighbors?
You say this wouldn't happen at a hotel? - Of course it could! Their could be a blazing row in the room next to you, or noisy neighbours next door, or across the street!
No one is responsible for the actions of their neighbors!