lets see what happens to the game as a whole if the best guilds in the wrold just sddenly stopped playing, lets see how awesome and epic your gaming experience would be, here's a tip, it won't, without these guilds and these players, the encounters would not be the epic clusterfucks they are today, with such tight tuning in places designed to push players, without that, you get humdrum "anybody can do this shit" encounters that are boring and uninteresting, so yeah, blizz care about the 0.0001% of the playerbase, because it is the section that keeps the game rocking in the way that it does.
to give an analogy, it is like running a hotel, the most important ppl aren't the hotel manager, or the snazzy decor, it is the cooks, the cleaners, the security guard, the "vocal minority" that keep things running properly, and keeps the guests the "vocal majority" aka "the whiners" paying and coming back.