It is pretty obvious that when you come into a large incomprehensible codebase (which most are), AI will be able to reason about it more quickly and guide you through it.
I switched away from my work for a few minutes, but at the very moment I'm using AI to summarise some spaghetti code in a particular area in our codebase, so I can refactor it.
And that is my style of working at the moment. AI coding is useful, sometimes amazing, but sometimes irritating, and from experience I think just telling it to refactor this area would result in something I'm not happy with. So instead I'm getting a handle on it, I'll form the design I want, then tell it to do it. I have a feeling a lot of complaints are from people who won't bother to do that.