I’m not accusing you of misrepresenting the situation, just trying to convey what’s objectively going on can feel very different from what people’s lived experience is. Someone with older siblings can barely register being bullied in some situations that really are traumatic to others.
I do remember school being this survival of the fittest type of thing as well. Some were naturally good at it, others not so much, different people handled it differently.
If my children lived in a war zone and were suffering constant (high risk) of being killed or mutilated, the mature way of dealing with that wouldn't be to teach them to take cover, or survival skills, or medical triage and first aid... it'd be to just leave and never go back. Get one million miles away from it. Normalizing it, saying "what are you gonna do, we live in a war zone" is strange. But it's just as bizarre to say "you should become an anti-war activist and demand that the diplomats make a lasting peace".
No, just get the fuck out as quickly as is humanly possible, and never look back. Later, when you're someplace safe, maybe you do therapy for the PTSD (I have my doubts that it works), but the first and most important step is to put distance between yourself (or your children) and the threat, enough distance that makes it impossible for the threat to follow.