[yencabulator]

It's about the likelihood and probability distribution of the kinds of bugs.

An Excel sheet made by NASA as part of their official space operations, to that rigor will probably have 0 problems ever. But compared to typical software, just consider this: Excel sheets do not have a culture of any kind of testing. If the output looks plausible, move on. Garbage in, garbage processing, garbage out.

AI slop has a similar but not exactly the same problem: It's highly, highly likely a human "reviewing" the generated code will just nod their head and not think critically/independently, just accepting all things that are superficially plausible. That may be fine for your webdev CRUD but I sure hope those people are never given credentials that can access anything critical.