Another lesson from the Yom Kippur war?

Every year the painful issue of the political and (as a result) military blunders by Israeli leaders in the days before the war is raised anew. This year, due to release of another batch of hitherto secret documents, the discussion of these failures is heating up again.

Individuals rarely learn from other individuals' mistakes and only a bit more from their own. History show pretty well that nations don't learn anything from any mistakes, and it will be of immense benefit to us if we succeed at least to remember the chief lesson of that war: be prepared.

There is another, secondary* lesson, though. I was reminded of it, hearing on the radio today somebody reciting a headline from 1973 Maariv daily:

Preemptive attack will create a crisis in our relationship with USA

That's all.

(*) Is it really secondary? You tell me.