I've always wondered about why they do that. The point of mmos and rpgs for a lot of people is, progression and progressing your character. I don't understand doing all the work just to have it all removed or have to relevel again in their many many releveling systems. If not blowing through content is a concern then maybe they should make their super brain dead content harder? Or just get over the fact that it might be cleared faster if someone has raid gear. I'm told most people in this game don't even raid so it shouldn't be that big of an issue.