Unless the bullets i'm firing kills 2 per shot.

But the point of the zerg rush is to create pressure into a checkmate scenario before your opponent can get established. A 4/6/10 pool is basically dead if the attack is deflected or fails to cause sufficient economic damage. In this analogy, Russia tried a rush, failed to cause sufficient damage, and now Ukraine is getting a fully upgraded army of siege tanks, goliaths, and science vessels