Quote Originally Posted by KumaAkuma View Post
Devil's Advocate:

If you can get the best gear with just myth. tomes, then what would motivate me to keep wiping in the new dungeons, after I have cleared it like once? Why should I keep playing those dungeons if there is no reward left over?
Less grind, helping others with the dungeons, vanity (coming in 2.2), etc. Everyone has their reasons for why they would or wouldn't do the dungeon after the primary reward is gone.