There is a budget hotel chain in the UK (premierInn) where if you complain you get a free breakfast and if you make your complaint official you will get a full refund. They have remained profitable for many years despite the obvious incentive for people to make unwarranted complaints.

This, I think, is the critical difference. If I get a hotel room, enter it, and discover anything is out of joint, I can walk downstairs and ask the manager for a refund, or at least a different room. If the same thing happens with an Airbnb, and the host has no interest in helping, you are basically out of luck.

If your hotel reservation is not refundable - you are out of your luck. You can potentially get refund from credit card company, as I once did, but the same is available for AirBnb - never tried though, was no need.