Issue is that multiple countries have systems where it’s, “They launched nukes? We’ll launch all our nukes”
The mitigation is basically, “We will wipe you off the map if we think even ONE nuke is coming at us,” and this has nearly happened several times, only stopped because the system has a human at the final step, and humans when realizing they could end the world seem to hesitate
We may be young at heart (emotionally), but we are old at heart (physically)