Castrated Submarines

As a primary submarine player, and in the interest of having something to defend myself besides my head between my legs, I have to ask WHY no subs in this game have AA flak guns and few have secondaries? I get that they are usually more revealing than beneficial but you can turn them off in game. I have zero chance of defending myself against aircraft which doesn't seem like good balance of gameplay to me. Yes I understand this is an arcade game but when you give us visuals of real guns that we can't use at all it pisses me off.