> It's the uncanny valley of AI. It's still not quite good enough yet that you can trust it blindly on a big codebase, so you still have to read and understand everything - which is often harder than just writing it up yourself.

You might as well have left it with: "It's still not quite good enough yet that you can trust it". That's the core of the issue. It doesn't matter what you ask it to do, it can't be trusted. Some things are just easier to verify and correct than others.