Until it isn't. The Cuban Missile Crisis could have put a very permanent end to it all, hadn't cooler minds prevailed, but that was a binary moment. There's absolutely no guarantee the coin won't flip to tails the next toss.
https://en.wikipedia.org/wiki/1983_Soviet_nuclear_false_alar...
His meeting with Cuba in the 90s and the new information presented that McNamara didn’t have during the crisis was especially sobering. McNamara ended the meeting early because he was “unprepared” to learn there were missiles already operational and authorization was already granted to launch if the Cuban build sites were struck.
Zero reflection and total constant analysis paralysis are both non viable.