Please let us change the percentage of armies killed by bomb cards, and please make them last-order cards so that they can be dodged. I'd imagine it's an easy and quick fix to do.
They do, but if you bomb 0 armies, 0 armies get removed. Then your opponent can (having first move) transfer in a stack of armies to defend the territory.
So if you have first move, deploy income in a safe place, then transfer it in to avoid your stack from getting bombed.