You ignore something else. The nuclear weapons would (arguable) create real pressure only against countries that don't have them, and even then - it's a big ris

You ignore something else. The nuclear weapons would (arguable) create real pressure only against countries that don't have them, and even then - it's a big risk to anyone raising the stacks and pulling the big gun. This is similar to the WW2, where chemical weapons although being available, weren't used.