It is mutually assured destruction on the cheap. You need coalition - well, you won’t get one, it will be couped or bombed one by one, it’s like general strike in service economy, not happening. See cuban doctors in carribean.
And with nukes you don’t die or what?
You don’t eat cows, you don’t get sick in my example, rather tame. Or you don’t get eggs or whatever animal vector. True posadism would be doing some fertility virus for humans and making probabilistic children of men type beat.
global south will be bombed by reaper drones for the next 50 years when they get ideas about not being poisoned by copper mine run offs, having ability to say to interconnected global community enjoy the fireworks then is a good deterrent for such behavior. Of course, especially leftists, don’t think that way, so we’ll see just bombing 



people trying to make sense of empire behavior without saying word empire, thus psyops