Well here's a problem for a few of us. Take my situation for example.
Right now, my Guild is still doing story mode Denova. Granted, I hope that changes on Tuesday, but we'll see. However in the mean time we're doing story mode, so the only Black Hole gear we're getting at the moment is through commendations. I'm a Marauder, and I'm a Biochem. So there's a few problems with that. The first, is that I have to rely on someone else to RE the pieces that I need. The second, is for them to do that I would need them to spend their commendations to buy something I need. The third, is that if the first two requirements I need are fulfilled, it's not even a 100% chance that they'll learn the schematic for the piece I need.
So unfortunately, for me, a PvE'er, I'm stuck with having to PvP for pieces that I need so I can min/max to carry the other people that're holding us back form hard modes.