I felt for the kid. The one thing about Marines, you don’t do it for the pay, you do it because you really want to be a Marine. You are right, the accident may have saved his life, but he might spend the rest of his life second guessing.
On the other hand, he had one safety hazard clearly marked in front of him and couldn’t get through his first day without putting both hands into it, should he really be handling weapon systems?