The elephant in the room was WoD. The era when people DID get done, only raidlogged cause there was nothing more, and came onto these forums in a flaming rage about how this expansion was the worst thing ever, a stigma that unfairly remains to this day. Blizzard is so terrified of people being able to say they're done that they're going to keep adding these systems. In Blizzard's eyes they see it as the hardcores can grind as much as they want for a small increase over everyone else and the middlecore have something to do once the meat and potatoes are done. But sadly the playerbase has just seen it as something they "forced" to do or they'll "fall behind" even if they're not hardcore or even middlecore.