Healers should be healing more than DPSing. There are roles for a reason. Good healers will have more time to DPS because their skillful execution of their role will allow for more windows of opportunity to add DPS. But, the game should never be so easy as to where a healer is DPSing as often as they're healing. A healers DPS should only be supportive with windows of opportunity. Rather than it being core to its primary gameplay.

And I hope it stays that way.

You have defined roles in this game, and that is what you should be doing