I think you are mixing up being a snob with respecting the chef's preparation of the meal.
If you go to order a seafood dish and it is roasted mahi mahi over a shiitake mushroom, smoked bacon, and bok choy broth, topped with slivers of ginger, rocoto, and scallion basted with smoking sesame oil most would consider it completely out of line to sub the orange-endive salsa criolla and a cape gooseberry-ají Amarillo sauce from another dish. Why not defer to the kitchen on how your steak is prepared?
If you want to drink crappy beer, be my guest. More good stuff for me!
Sorry, I don't think completely changing all the ingredients of a dish is remotely comparable to rare, medium or well done.
I don't get to go to pricey restaurants very often, by choice. I choose to spend my money on other things. However, I like my steak medium rare. When I used to order it that way, it almost always was delivered rare, if not almost raw. So now I order it medium and get about what I want most of the time.
Anyway, the chef is being a snob in this case or is ignorant of how many different ways people around the US and the globe eat steak. Its merely a matter of taste. Condiments served with steak vary as well. If someone likes steak sauce, what do I care, although, on the rare occassion I've had what I considered a perfect steak, I didn't feel the need for condiments. (To me, perfect is medium rare and cuts as easy as soft butter.)
Why is it not okay to have some steak sauce with your steak, but it's perfectly okay to eat horseradish or horseradish sauce, with a beautiful piece of prime rib? It's okay to ask for the end piece of a prime rib, if you like it more cooked, but not to ask for more cooked piece of steak?
Bottom line is, Webber handled it perfectly. If a restaurant does not have what you want, you leave. That's what I'd do. No point in buying something expensive that you know you won't like. A person isn't going to like something, just because someone tells them they like it the wrong way. Did you know that rare steak has to be warmed in the oven after it's cooked rare? A true piece of "rare" steak is seared, leaving the inside still cold. It is then warmed in an oven to get the iside to be warm. So it takes longer to prepare.
http://en.wikipedia.org/wiki/Steak
Such a fun question....
