Nukes have nearly been launched many times. In the Cuban missile crisis event you reference, only ONE OF THREE refused to launch. I do not understand how any of this is supposed to be confidence inspiring in any way.
Collaborative disarmament is the only solution.
What is the benefit of smaller reactors? It seems like they would be worse in just about every way? Wouldn't smaller reactors be less efficient as you need more sites/material/personnel to generate the same power? Wouldn't needing more sites also make logistics and regulatory approval more difficult?