The way most class mechanics work in this game, there has to be some form of time restraint. If not, I could take a tank and 3 healers into any fight, rotate heals and win. There would be no challenge. We would never run out of our resource, as they constantly build in combat. The easiest way to make content challenging is enrage timers. Your tank has to be geared enough to hold aggro and take hits. Your healer must be geared enough to heal the tank. Why shouldn't your DPS have to be geared enough to do damage?
fact of the matter is, we were geared, maybe it's just once you hit 50 going to hardmode flashpoints to get more gear is too much of a gap with those stupid timers