"So, just trying to understand this - he admits to code being buggy and in the same sentences states that he (the engineer who created the bugs in the first place) also debugs it? Where is the logic in that?"
No I'm highlighting that the logic itself is stupid
If the point is that you can't solve with AI what you messed up with AI, but with human intelligence spending a bit more time on the problem does indeed tend to help, you need to explain why his technique with the AI won't work either.
Plus he's adding human input to it every time, so I see no reason to default to "it wouldn't work".
Well you said it yourself, you are literally comparing human intelligence with the so-called AI, or better said, advanced text generator. The differentiator being, the text generators have 0 intelligence, otherwise there would not be a flood of AI gurus explaining the latest trick to making them finally work.