I'm really mostly curious about what people who primarily play healing classes DO with all of that excess time just standing around. Unless you have a really crap group that warrants constant Cure/Physick/Benefic spamming, I just don't see how standing around literally waiting for something to happen is enjoyable. If the group is garbage, sure, heal the whole time because they're bad, should feel bad, and would lose without you doing that.

Nobody, or at least most people anyway, who are pro-healer DPSing in Duties (not just savage) has ever claimed that they need healers to DPS to win an encounter. They just want people who are there to be doing something to help move the instance along instead of dancing or jumping around the whole time.