Earlier quoted context omitted.
Except they don't care about you. Someone could burst through the door and skin you alive, but your coworkers won't be in the least bit perturbed unless: 1) Your mutilation was against company policy 2) Some bits of you got on their shirt. Personally, I'd much rather deal with people knives drawn rather than work hard pretending to care if each other lives or dies.
Sounds like a wild place to work at. Also sounds like a great way to end up isolated and alone. Even at work, you sometimes need people in your corner.
Ever wonder why shows like Survivor and Battle Royale games are so popular? That's how office life is these days. Nobody is ever "in your corner" as you put it. Everyone is always and forever trying to gut everyone else in a neverending zero sum game.
Unless you work in a new/high growth field or something, then collaboration can have benefits, but in most static corporate environments, the only gain you have is from someone else's detriment.