Originally Posted by
A Chozo
It is. They made more difficulties exactly because only 0.01% of their playerbase went to raiding with only one difficulty. If that continued, in the next expansions, the population would be smaller and smaller because only the hardcorest of the hardcore would remain, and they can't fund WoW alone. Ya need the overwhelming majority of casuals, who will only buy WoW if there is enough easy content. And no, the world and dungeon content are not enough, because they spend too much time designing the raid. It would be a big chunk of content left out of the general playerbase's reach.