I think you missed the point, lol. Obviously COD isn't a remotely realistic portrayal of war. You haven't understood a thing if you seriously thought I was saying that.

But we weren't discussing realism of mechanics, rather, realism of environment. And the environments are pretty true to life.

It's the mechanics that make a game fun. Not necessarily the environments. Though they of course help. Fun mechanics are what a game is about.

Such as... survival mechanics!!