Fighting against humans should not compare at all to fighting against "monsters." The mentally traumatized veterans of Vietnam and WWII who were drafted into fighting a war they didn't want to fight on a massive scale is completely different from (as a more comparable example) wanting to live in a remote tribe and hunt animals with spears for food.

There's no question of glory. I don't dislike my life. It's quite nice. That doesn't mean there aren't other lives I'd prefer.