This pretty much sums up SE's stance on healers DPSing in Alexander. I believe they are truly not happy about endgame DPS healers. Even with food and an accuracy relic (which we still don't have and don't even know if it's gonna be customizable or even if they will allow accuracy on healer's relic) it's very likely healers will be miles away from even smelling the accuracy cap in Alexander. Just leaving it here.
I would've preferred they made it hard but possible with some fine tunning and dedication, but the absolute and complete lack of accuracy in healing gear feels like they've completely walled any chance to DPS in the endgame (other than Bio II, Bio, Shadow Flare, Combust and Combust II which can never miss, but that's gonna make very little difference).