When running dungeons prior to lets say 2.4 Snowcloak -esque it is ( I'm just saying ) expected of the healer to do some type of damage new players our not....Vets want you to do this because they're either running a Dungeon for questline/progression purpose or an alt so they want it to go as fast as possible. Especially in low level dungeons where they were meant to be tackled by 3 people ,as a healer wasn't nearly as expected to stance dance around lets say 15-35 , so you helping out would have helped......BUT THE MORE IMPORTANT thing in your defense is ....You don't have to and at the end of it all you're a healer and if that's all you bring to the table no one can truly be mad at you .....