I think one of the reasons why big corporations in this sector are still keeping this "open prompt" UI as a main one is to keep up pretense that these programs

I think one of the reasons why big corporations in this sector are still keeping this "open prompt" UI as a main one is to keep up pretense that these programs are actually thinking. After all, when we open a chat with another person, there are no action buttons, scripts or prerecorded routines, because humans don't work or don't talk like that. Programs on the other hand benefit greatly from the predefined lists of actions and operations. It is telling that currently the only advanced UI for the neural network program is a Copilot, which while being based on the same LLM as the other chats, is used and feels closer to a common program - IDE with autocomplete. So people using it are expecting more of the routines and action buttons. tl;dr - neural network companies are employing artificial tricks and dark patterns to trick user into thinking there is intelligence on the other side of the glass.