Humans can be surprisingly strong when they aren’t worrying about self-preservation, actually. I guess the thing about zombies then is that every time they attack, they damage themselves in…
lolol that’s another thing brought up in WWZ - most modern military armaments (full automatic rifles, shrapnel-releasing explosives, etc) are good at killing people, but tend not to take out the brain. Assuming that the only way to kill a zombie is by destroying its brain, a lot of those modern military armaments are rendered ineffective (full automatic rifles can put lots of holes in things fast, but are also harder to hit small moving targets - like the head - with; explosive shells blow zombies in half, but those crawling zombies are still a threat). WWZ then proposes semi automatic rifles as being the best anti-zombie weapon, since their single-shot nature encourages careful placement of shots and box magazines allow for quick follow-up shots.
I feel like the army does show up in a lot of zombie things though - military forces definitely play a major role in World War Z, but 28 Days Later and The Last of Us also come to mind.
…I should probably stop before I start raving about how well done the zombies and combat and everything else was done in The Last of Us, but that’s another thing you should def look at. At least watch the first 20 minutes, because damn that game knows how to do a narrative.