Why not? (Other than they don't currently exist). I would absolutely get a robo-plumber. I have other tools for fixing things around the house. LLMs are just tools.
Nothing wrong with getting a robot plumber, I would do it too. But I wouldn't go around doing all my friend's plumbing and/or completely redo all of the plumbing in my home with it and then call myself a plumber (notwithstanding that plumbers are licensed professionals).
I think the issue is when you claim to have _done_ something yourself when in fact you didn’t. I think people have trouble differentiating real value vs what they think of as some flavor of carpetbagging