Except it *isn't* a single persistent realm. It's a mass of interconnected servers hosting thousands of concurrent instances of zones, none of which are discreet.
Even putting that aside, my point was that "Ignore all the non-instanced content" is a pretty poor argument for the quality of a game that exists in a genre where the persistent world, not the instances, is the defining factor. It's like saying that going to see a baseball game is fun if you ignore the game and focus on the snacks and hanging out in the stands. That may very well be true for some people, but what does it say about the sport if that's the best its defenders can come up with?