If they didn't you wouldn't need the operator, you'd have replaced all your programmers with no drawbacks by now. As long as we keep hiring humans that is all the evidence you need that these AI fails in ways humans don't.

Junior developers fail in different ways than senior developers too; that's why seniors oversee juniors. But this doesn't necessarily mean that the senior's and junior's intelligences differ in kind

Your argument "AI needs supervision, therefore it fails in different ways than its operator does" holds.

Your argument "AI fails in different ways than its operator, therefore the AI's intelligence is different in kind" doesn't hold.