The question is is a computer with a human stronger than a computer without a human. At what point does the hybrid go from being stronger, to the human getting in the way, or steering the computer in more wrong directions that right ones, or the human not being able to keep up. Does the human add enough extra randomness to be of value for a while, even as a minor co-processor.
But I don't think it's randomness, because that would be easy to add. It's more like a different perspective on the training data, a different set of perception categories, and a different set of skills used to work with all of the above.
Those skills aren't very efficient, but they're the best we can do. We're used to their strengths but we don't like to think about their limitations.
It's completely plausible that AI will replace some of them, and not implausible it could replace and improve on all of them.