It's really very simple...a healer who DPS and heals optimally is better than one that only heals. But if I have to choose between a healer that only heals and a moron spamming broil/stone III/Malefic II at the expense of very avoidable deaths, I'm taking the healer that only heals and cleanses stuff when necessary any day of the week.

The problem is, not everybody has the same skill ceiling and not everybody is willing to put the same amount of effort into their healing jobs; being overly aggressive about healers not DPSing only leads to healers DPSing poorly and neglecting their healing duties, which ultimately is much worse than a healer that doesn't DPS but makes sure everybody stays alive.

Lately, I'm seeing a huge influx of terrible healers that pretend to be DPS players, which is why I think people that take a very aggressive stance against those that play a bit more conservative is not contributing.