p, part of the point is that you can't be online all the time, i work 12 hour shifts, and of course after that, i'm not gonna spend hours fighting back between shifts, its possible that even with black outs, my country would fall with out me having much of a chance to fight back
having a defensive weapon that shoots at navies, is rather important from a game stand point
although, maybe it'd be better to make L2SMB an offensive/defensive weapon? rather than just an offensive weapon
also, from your analogy, the "old rusty helicopters," you talk about, would be like 120Q? which leads to something i've thought about for a long time, if these Helis are shooting at the fleet, even in a defensive mode, why doesn't the navy interceptors, and navy missile interceptors participate in the battle? if you where to attack the fleet, those would defend the fleet, but do nothing if the fleet makes the attack, doesn't really make since. their really is no need for navy interceptors, and navy fighter planes, if they, (realistically,) participated in any battle involving the navy, regardless of who presses the button!
same with ground units, if DMB are responding to a MRMB assault, why can't MIB in the offensive unit reduce the incoming missles targeted at the MRMB in its own unit?