So what would you say a healer do when there is no healing to do(which is very very often assuming level 80[I'm being generous] and you're not spamming Cure I or an equivalent)? Stand there? Emote? Pop open a Realm Reborn Red to celebrate everyone being at sufficient health? No, seriously. What would you have them do? What ELSE CAN they do other than DPS?
This has absolutely nothing to do with a "gogogogo" mentality and more understanding both the gameplay systems at work and the fact that this is not a single player game. Yeah, you could "focus on healing" but by doing so(again, assuming level 80) you're greatly disrespecting the time of your teammates because once HP is sufficient, you're doing nothing to help out.
With all due respect, a healer that focuses on healing(especially with how pitiful the last few dungeons has been hitting) IS irrelevant, because nothing in this game(even Ultimate!) hits hard enough to warrant that much healing uptime.
