Having been in a position to take fast food orders from people, there are a whole lot of interactions beyond just ordering food. People ask a surprising number of questions about the menu, food content, and other things.
That's all stuff that LLMs are really, really good at handling though. All you need is prompts that explain what's on the menu, all the ingredients, allergy info, calorie counts, etc. and it will be able to handle it. And I'm sure they'll be recording questions for which the LLM has no good answer, to improve it.
Note that people adjust their behavior as well. As people interact with these more, they'll sometimes be frustrated but they'll adjust.
Now, after all that, please don't paint me as a techno-optimist. I think that it's very likely that we're about to cause some massive social problems by making it so that the average human doesn't have many options where they can provide more economic value than a machine, and meanwhile, are there really that many problems today that tech can solve, as opposed to problems of simply coordinating people?
And that's not getting into the whole "are AGIs going to make humanity extinct" question, which, after getting into it, I think is pretty darned likely at the rate we're going.
I just encountered a case of a hardware OEM adding a LLM chatbot to their parts lookup page.
I asked it for the part number of a common failing part for a given model, and it confidently replied - with a part number that does not and never has existed...
It was formatted right, and the correct number of digits. It was just that it was wrong.