Not all healers, but I have noticed that a certain group of players, mainly healers and tanks, who complain on forums, reddit or you tube about not getting commendations at the end of dungeon runs.
There is even a popular video on you tube of a certain decent AST who is bitching about an undergeared tank pulling big in a leveling dungeon and him not getting any commendations at the end of the run. I think that is extremely arrogant tbh.
In this game healing or tanking are roles just like DPS. They are not more important, nor are they more challenging to play as a rule. Sure there are some encounters that require more healing or tanking skill but that is not always the case.
I really wish tanks and healers got rid of this arrogant , doing-us-a-favor-for-tanking/healing, attitude. No one put a gun to your head and made you play a tank or a healer. You are not doing us any favors and no, your jobs aren't more challenging than DPS roles.