In all my SH3 playing days I have only ever had
all dead or
none dead, never
some dead.
Now while I find this whole concept about priority #20, karamazovnew does raise some valid points. Recognising FPS for what they are, when someone gets shot "you" can usually patch them up. Quite arcadish (run over to injured man, press A, followed by X, followed by Y and voila!), but nonetheless possible.
So if I cop critical damage and choose to go for a look-see, what will I find? Will there be a bloodied body there waiting for me to drag him, or at least order another crewman to drag him, or will the game automatically take care of him, waiting only for me to give the "dispatch" order? This is a conundrum that the devs have created. They may not have even thought about it to this level.
And another thing, not all U-boats had qualified medical staff, at least beyond first aid. Injured crew tended to be dropped off at a milk cow docking, as the milk cow usually had higher skilled medicos. This adds another element of complexity to the whole idea. We know SH5 has milk cows, but will it also allow you to offload injured or sick crew?
Again, not stuff I personally care about, but as the devs have chosen to go down this path...