Let's rework this, I feel this isn't accurate....
Actually, when your parents die, and your first thoughts are to get quickly to business to help prepare for their funeral... whilst in private, you go through an existential crisis questioning if you will suffer the same fate as your parents... and you go into high gear survival mode... you have to keep yourself healthy, and avoid getting into accidents.
The idea of altruism doesn't puzzle you, rather you feel it is necessary for the survival and continuation of your own species, and you look towards the idea of altruism as a way to increase your own likelihood of survival in the world.
Not always stuff that is outlandish though. But you put a priority towards home, family, work, and food above going out to socialize and party.
Actually, you end up doing the right thing by notifying the police and other legal authorities that your friend died of a drug overdose. Do the right thing, even if you are standing alone.
Or you don't even mention about joining the military altogether. It's none of anybody's business why you would or wouldn't join.
Sometimes, but not all the time. Rather, you'd end up opting for the safest rank, as far away from enemy fire as possible. You'd rather voluntarily become a nurse, medic, or part of the M*A*S*H unit... or join the Peace Corps.
You wouldn't use weapons, period. Rather, you'd stay clear and far away from someone who offends you. If you need to fight, you'd do it ONLY if your life was in clear and present danger.
Getting financially stable is ONE of your top priorities.