I've thought a lot about this and I am pretty sure this is propaganda to further the Mutually Assured Destruction doctrine, and that no nation would launch nuke

I've thought a lot about this and I am pretty sure this is propaganda to further the Mutually Assured Destruction doctrine, and that no nation would launch nukes except when directed by the highest authority. There would be no difference in efficiency of MAD, since it's all about what the adversary thinks. I am sure people smarter than me have gamed this out and evaluated the risks of launch under false premise vs risk of non-effective deterrant.