For sure @Robert5946 there are hosts that are not taking the care they should be with their listings- and guests fall foul of them and need to be supported in such cases. No argument from me on that.
My concern, and the concerns of many others here is that the system is so easily open to abuse by guests in the know- and that we could well fall foul of a guest who makes a complaint about a listing that isn't dirty or less than perfect, with the purpose of playing the system.
Airbnb's policy of shoot the host first ask questions later (or don't ask questions at all) leaves all reputable (super) hosts as fair game, unless, as you say there is a review policy with the host before action is taken.