Like Okay, it sounds like a valid point. The issue is the hand waving and the fact it is not grounded in reality.
So while one person is getting a 5x increase in productivity, one or two get a corresponding 5x decrease.
I can’t just copy-paste what comes out. But I have to say I’m able to get substantially more done as it saves me a lot of grunt work. You do have to learn how to use it like any other tool. I have found that it’s helped me sharpen a lot of my own skills in multiple areas and improved my understanding of systems I’m working on. I am able to learn new things much faster because it has a real-time feedback mechanism.
I can’t speak to your direct report but I’d be concerned about falling behind as a leader if you aren’t using it in the course of your regular work.