It's not. The second boss in The Esseles, Ironfist, is tuned pretty bad. Even with interrupts, he will do a LOT of damage to the group and tank.
We were not able to down him as fresh 50s, but a couple days and some new daily and PvP gear later we were able to down him far easier.
So... you mean you actually had to do some progression and get geared up for running harder content ? who woulda thunk it. He is Tuned just fine its called Hard mode not walk in here and ill lay down for you mode.