If we fully allow the use of AI that it becomes a normal thing then post quality will drop drastically because the contemplation would be , why waste time on research when I can just ask an AI and then paste it here in quotes.
AI tools can make very high quality posts, better than most of many shitposters' posts, it's undeniable.
But it is not acceptable reason for shitposters to use AI tools for generating more quality posts than what they can do by themselves.
In my opinion, the main reason of this strict intolerance is those AI-generated posts are not works/ products of shitposters. They steal products, posts of AI tools and make it like their own posts. What for? Perhaps for finding merit with easy ways, and meeting their campaign post quota super easily without efforts.