The implication I gathered from the comment was that if students are resorting to using chatgpt to cheat, then maybe the teacher should try a different approach to how they teach.

I've had plenty of awful teachers who try to railroad students as much as possible, and that made for an abysmal learning environment, so people would cheat to get through it easier. And instead of making fundamental changes to their teaching approach, teachers would just double down by trying to stop cheating rather than reflect on why it's happening in the first place.

Dunno if this is the case for the teacher mentioned in the original post, but the response is the vibe I got from the comment you replied to, and for what it's worth, I fully agree. Spending time and effort on catching cheaters doesn't help there be less cheaters, nor does it help people like the class more or learn better. Focusing on getting students enjoyment and engagement does reduce cheating though.