It's mutually exclusive because the combat oriented roles actually relies on the shipside roles to a degree, when I ask a CT which things I want I don't really need to hear the guy say "Here you go." before handing said gear out, when I'm getting analyzed by a doctor, I don't need to listen to some made up RP ramble about what my injuries are, when I'm waiting for the dropship to land or go up, I don't need the fucking PO telling me that he "only launches on schedule" said schedule being only launching once every five fucking minutes, and so on, shipside roles at its base exists only to serve the combat oriented role and to do such efficiently means they shouldn't waste time RPing.