I'm more interested in what Finney's job actually was on the ship. Records Officer is painfully vague. Is he the guy in charge of the file room? Is he in IT? And what makes him so great that "the service can't afford to lose men like Lt. Cmdr. Finney?"
I can also understand rotating duty assignments, like cross-training, or everyone having an Emergency Preparedness Assignment in case vital crew members are killed. But wouldn't it be more efficient to have a specialist in the pod instead of your file guy who gets seven hours of refresher training once a year? Or - idea - make this function automated instead of having some poor file guy crawling into a pod and jettisoned from the ship.