If you complain the the current generation of LLMs isn't as impressive as some people try to prove it is, the shills complain that you used the wrong prompts and maybe you should fine-tune the model. I don't think people should spend much time trying to write a prompt to find a working solution because they could just do that. In the author's case, if he used the summary provided by ChatGPT, I doubt that anyone would have realized it's wrong, but that doesn't mean it's good either.

The problem with LLMs is the lack of reliability and coherence. If it gives you a wrong answer and you ask it if it's sure, in most cases it will show another wrong answer and you need to go through multiple of these hops to get something fine.