Agree, but it's more than that. It's not just having your back. You know how unhappy a ships company can get if you have one unhappy Chappy or chapette!! The poison sets in - whinging, (from both sides). Loners just don't fit in.To true, you want to know your oppo has your back.
You have to be a certain type of person to be in the mob. That's not meant as a slur on anyone. Not every one can put up with the routines, discipline and hardships. Family has be to left behind, not just physically but mentally too.
If you get the chance to go at Raleigh or whatever establishment and you don't like your career path - leave! Simple. If you're a civvy and you don't like it you move on. Jack gets few chances, so if it's there and you want out - be gone.