There was a guy I knew who had dropped out of 6th form 2 years earlier to play WoW, he would get up at 7 every morning and leave with his dad to go to college, but then came home because he wasn't enrolled any more, just to play WoW. When his dad was only holiday and it was term time he'd have to get up at 7 and go to the library or the park all day.
People like that don't raid because they want to complete the content, they raid because they have thrown their life away and are too frightened to turn the game off and enter the real world again.
None of the guys in my old guild enjoyed raiding, it was the most boring thing in the world to them, but since they had wasted 3 years of their life getting there and no longer had any friends left, what else were they going to do?