[ Jim is more used to the intricacies of space travel than most, not that he assumes as much about his current conversation partner. The hard answer of that question neither of them have asked each other out loud is simple: they die. If no one is there to pick them up, and the Moira just wanders past---

Jim has training to back him up, but that won't do anything for him if it is a planet where he would have needed an EVA suit. He'd be dead in moments. ]

It strikes me that they might not have considered a number of consequences to their actions.

[ Which causes Jim to question the validity of their claim on this ship. ]

It could be something like that. Seems to me like its something we don't have a choice but to go along with for the moment, though. See where it goes.