There absolutely is an epidemic of troll answers on Reddit but not on programming subs, presumably precisely because of the aforementioned reasons. The kind of person that knows the actual answer (or has sufficient background knowledge to BS a believable answer) is the kind of person that won't post a troll answer in a programming sub. The kind of person that will post a troll answer won't have the requisite background knowledge and will be immediately "outed" and downvoted on the more legitimate (not r/all) subs, and eventually be discouraged from trying.

ChatGPT is immune to this organic feedback loop.