As a healer, is it my job to DPS? A new perspective.

[Canadane]

And before anyone points out that tanks do have the debates about tank DPS, those are fundamentally different in premise, because they generally revolve around trading survivability for damage, and not around whether or not a tank should be attacking the boss all the time.

Heck no, it's the same argument here as the healers. Unless you will die or lose enmity focus, you should be in your offensive stance as a tank.
Like I could go on a huge tank related tangent here but it really us the same logic applied to the healers. Everyone needs to give 100%!