With 19 years in the US Army and two wars under my belt I hardly think I have a problem defining what is and what is contrary to military service, thank you.
So you'd just leave your dying friend to the enemy if going to rescue him meant exposing yourself to hostile fire? I don't get it. How is that any different from exposing yourself to a bloodborne disease that possibly could kill you? Should firemen not go into burning buildings to rescue people because they might get killed?