If were only looking at HW for now it's not unreasonable to be asking anyone to be doing more whether its the single target tank who pulls big groups and doesn't want to use overpower ect. cause it cost's to much TP. BRD/ MCH who dont use songs when they should be. or the afk healers who fail at the ABC always be casting.

VIX as it is now wasn't built for only healers cause the dmg output from dungeons or what not don't support that kind of play. They might change that for SB but would you want a tank who pulls everything and spams flash til he is out of MP and stand around for the rest of the fight? If I don't dps on my healers in leveling or roulettes when I do them I find it incredibly boring to stand around doing F all waiting for dmg when I can help clear the dungeon quicker and possibly skip mechanics or phases by adding in a little dps