The 'military history knowledge' line is quite telling here, lots of people know how fighting should work, but you can tell just from playing online FPS, some people just have really fast situational awareness. Warfare isn't just knowing some tactics, it's reacting to situations that have just devolved into chaos and then making the optimum decisions. And you need an extreme level of physical resilience to still be doing that after you've run out of twinkies Redditors are so far out of their league