In my FoF training, blue on blue usually occurred in the heat of the moment when there was still a vicious fight going on.
Thus, we never bothered treating the casualty, as pushing the fight at that point was the priority. Buddy aid is a luxury that usually is not afforded.
But, I agree that staying in character is important. We did, and it was addressed as a learning point afterwards.
I'll also argue that zero-defect mentalities have little place in training....well, if you want anything resembling learning to realistically occur, that is.
Very succinct!