I have several years sleeper in the berthing compartments of both DDG and LHA.
Your points are valid.
These guys were likely injured upon initial impact. Some may even have washed out the hole in the side of the ship.
Just as likely they were thrown, in a deep sleep, out of their racks onto the deck, in pitch darkness in a flooding compartment...that requirement of being able to find your way out was going to be critical no matter what.
My wife kind of laughs at me, but when we go to a hotel (or most recently on a cruise ship) I have a flashlight next to my bed, clothes nearby laid out, and I have two routes out of the room to the outside or deck that I navigate with my eyes closed (I only did that with my eyes closed on the cruise ship when nobody else was around!) a few times just to be sure I can do it in pitch black.