AI-generated code is in Codeforces.
I've seen some higher-rated people talk about this (one of the top posts by unalive right now), but recently, I personally saw people using AI and mindlessly pasting ready-made code (and complain about it not passing some tests).
Why?
Auto comment: topic has been updated by adhdev (previous revision, new revision, compare).
I'm pretty sure the reason why you're being downvoted is because Um_nik already discussed this; furthermore, I think nobody likes to talk about it. We're just here for fun at the end of the day.