That's certainly a take. If the menu says sirloin steak and doesn't mention any sauces, and I order a medium rare sirloin steak without mentioning any sauces, then I rather expect to get exactly what I think I'm ordering, a medium rare sirloin steak. Maybe a bit of a herby garnish wouldn't be a terrible surprise, although if it changed the flavour completely then it really ought to say about it on the menu.

It seems to me like steak is maybe one of the dishes where what you're saying is least true. I know a great deal about what it will look and taste like.