What are the "interesting parts" is hard to quantify because my interests vary, so even if a machine can do those parts better than me, doesn't necessarily mean I'll use the machine.
The arts is a good example. I still enjoy analog photography & darkroom techniques. Digital can (arguably) do it better, faster, and cheaper. Doesn't change the hobby for me.
But, at least the option is there. Should I need to shoot a wedding, or some family photos for pay, I don't bust out my 35mm range finder and shoot film. I bring my R6, and send the photos through ImagenAI to edit.
In that way, the interesting parts are whatever I feel like doing myself, for my own personal enjoyment.
Just the other day I used AI to help me make a macOS utility to have a live wallpaper from an mp4. Didn't feel like paying for any of the existing "live wallpaper" apps. Probably a side project I would never have done otherwise. Almost one shot it outside of a use-after-free bug I had to fix myself, which ended up being quite enjoyable. In that instance, the interesting part was in the finding a problem and fixing it, while I got to outsource 90% of the rest of the work.
I'm rambling now, but the TL;DR is I'm more so excited about having the option to outsource portions of something rather than always outsourcing. Sometimes all you need is a cheap piece of mass produced crap, and other times you want to spend more money (or more time) making it yourself, or buying handmade from an expert craftsman.
For you, what are “the interesting parts”, and why do you believe in principle a machine won’t do those parts better than you?