In other words, Blizzard is telling the story that Blizzard wants to tell (albeit with many loose ends and very, very slowly - how long did it take us to get anywhere with the new plague storyline? Almost six years?), and the players are really just along for the ride. WoW kind of has the perspective of the Tom Cruise War of the Worlds. That movie spends its entire time focusing on characters who, in any other movie, would be extras streaming past the camera.
Of course you can tell stories about people like that. But you have to stop and focus on them, and narratively speaking, WoW doesn't.