There's nothing 'good' about a healer dpsing. You're taking away time and resources from what you are most effective at (healing) and putting time and resources into what you are less effective at (damage). Every time I spend a global and energy on a grenade as an operative healer, I'm doing several things I should not be doing as a healer:
1. Putting myself in harm's way with a short-range ability
2. Lowering my energy level, possibly into a lower recovery bracket
3. Not casting my only heal that heals for a respectable amount
And yet I am being rewarded for doing these things with more valor, commendations, and mvp votes (rarely).
The medal system rewards bad play and punishes good play, period.