That would lead to levels of stone walling so extreme that no one would actually bother engaging. We already have that right now, with editors treating some art

That would lead to levels of stone walling so extreme that no one would actually bother engaging. We already have that right now, with editors treating some articles like fiefdoms and being very combative to any change. Usually using pedantry or the revert rules. Imagine if you could just make any claim, and then there needs to be a process just to disprove it. Plus with the 3 revert rule it would basically turn the entire website into hell.