I am going to be honest. I spend the majority of my time dpsing in dungeons as a SCH. Sometimes I make it a goal to not toss out a heal the entire time (not counting pet lol).
However I have no problem with healers who don't dps and people who do need to grow up or take therapy for their OCD. Their was a time though where the healer wouldn't dps and the two brds were putting in the shittiest numbers I have ever seen and neither played songs. That was probably the worst run ever and I got no commends even though I did most the work.
