As someone else said, but I will say it again, if content is easier with 1 class, why bring another. In my guild, which wishes to participate in competitive raiding, I will say if there was a sage of equal level to me, they will be taken before I am, because as an Operative, my healing output isn't the same. Yes both of us can clear the content with ease, but that's because we are both geared now. But when you have fresh content, it will be easier and more lenient on mistakes for a sage. And I agree you most likely play with poor players as most of the game's current content is DPS checks, not heal checks.