The guy indeed comes across like an arrogant ass but CoD's focus is competitive multiplayer. It's the old "competitive edge" thing. I personally don't buy that me having a field of view that is higher than yours is going to give me any discernible edge - the game moves so fast that the difference is negligible. You'll kill me because I suck regardless of the fact that I can see a tiny bit more of the field than you on the edges.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” - Mahatma Gandhi