I mean it also contains great stuff. Niche workarounds, ways to do something more efficiently than some standard library function does.

You just need a means of telling apart the good and the bad. Because there's also people smashing their forehead on the keyboard until it happens to be something that compiles. And people repeating urban legends and outdated info. You somehow need background knowledge to tell which is which. AI didn't invent phrasing some nonesense with full conviction. It is very good at doing exactly that, but we humans also have been doing that since the beginning of time.