Because, just between us, what are these nukes, like firecrackers fired from a hand-held mortar?? ;)
Or a nuke fired from a cannon like a cannonball... ?!?! ;)
There's no real nuke launched from a rocket silo, like real intercontinental Cold War relics !!!!
So I have an idea for a remake of a vanilla space rocket. When you load a satellite, it flies into space. When you load a nuclear payload, the rocket stays there until you choose a target... This will only be a problem in the Space Age... but that will soon be resolved differently.