Eh I imagine they looked over the code as well, doing code review -- and at first glance, the code looks reasonable. I certainly wasn't able to catch the bug even though I tried to find it (and I was given a tiny collection of lines and the knowledge that there's a bug there!).
If anything, I think this says something about how dangerous ChatGPT and similar tools are: reading code is harder than writing code, and when you use ChatGPT, your role stops being that of a programmer and becomes that of a code reviewer. Worse, LLMs are excellent at producing plausible output (I mean that's literally all they do), which means the bugs will look like plausibly correct code as well.
I don't think this is indicative of people who don't know what they're doing. I think this is indicative of people using "AI" tools to help with programming at all.
If anything, I think this says something about how dangerous ChatGPT and similar tools are: reading code is harder than writing code, and when you use ChatGPT, your role stops being that of a programmer and becomes that of a code reviewer. Worse, LLMs are excellent at producing plausible output (I mean that's literally all they do), which means the bugs will look like plausibly correct code as well.
I don't think this is indicative of people who don't know what they're doing. I think this is indicative of people using "AI" tools to help with programming at all.