Isn’t this how high end michelin restaurants work? You sit down, eat the chef’s daily menu, and drop a few hundred dollars per person. You are there for the art of it and you trust the chef’s choice.
Some types, yes, although the service is at such a high level that they are usually accommodating far beyond what you'd expect.
The restaurant might have a 7 course tasting menu with fixed items on it for example, but if you say you're allergic to shellfish, they'll often not just remove the shellfish from your dishes, but re-engineer or fully replace the dishes that contain shellfish so that what you're getting isn't any _less_ than what someone eating shellfish would be having.
Ideally yes, although I think they end up cooking for the guide rather than their own tastes.
There is a possibly apocryphal story that Marco Pierre White was once asked for a plate of Chips, so he hand cooked them and charged the diner something like £100 for his time.
