1) We HAVE to be in melee range to do any damage. Let Fly is not a DPS skill.
2) We cannot kite and do damage.
3) We have no escape skills on the level of HIPS.
We should be on the top of the DPS food chain, ST or AOE, because we cannot do damage from the relative safety of 30/40m, we can't run around kiting and fulfill our main function, and we have no ability to escape if things go south. All we can do is DPS at close range. I know Hunters, RKs and Burgs might not like hearing that, but they have inherent class advantages that make their DPS far less risky (and no, heavy armor isn't as big an advantage as you think it is).