I assume these can't be automated easily because they involve dealing with a complex, unpredictable environment. AI has gotten there, hasn't really gotten closer.

Roomba's are really slow. There's no robot that can quickly find and clean a spill while keep people around the area safe. That kind of progress hasn't been made with robots and AI.

You can have something like a system where the restaurant is a big box that cleaned automatically, yes, but then it also becomes unpleasant. Kiosk ordering might work but then cashier is also the "public face" of restaurant.

It all comes down to "why do people go to restaurants instead of microwaving Trader Joe's stuff", right?