Pretty sure you don't get the point of my post. I'm not saying that Healer's should never dps. I am saying that it should never be EXPECTED by anyone. A healer's #1 priority is healing, not DPS.
Also, don't compare different platforms. The whole point of a FPS is to shoot a gun .... If you don't shoot a gun you will fail in a FPS. Real life War should never be compared to anything digital ... ever.