That's what KDE (and gnome, to a lesser extent) have been trying to do for a long while.

The fundamental issue is that a GUI is a static abstraction over a CLI that allows for millions of potential combinations. You can only expose so many options in a menu before the interface becomes completely unusable.

To expand on your analogy, it’s like running a restaurant that only uses automated vending machines to serve food. It works perfectly fine if someone just wants toasted bread. But the moment a customer asks for more than toasted bread, you're toasted.

Imho, the best bet for the future is a bunch of pre loaded llm skills and clis an agent can work with: getting the chef to use pre-approved hardware, sorta, that can cook up anything that is needed.