There just happened to be a whacko that got into the White House, but if ~70k (out of >100M) had gone the other way in 2016, Hillary Clinton would have won and the world would be a different place. (See also ~500 votes in Bush versus Gore.)
I'd be curious to know the 'insurance premium' that was paid by France every year and the total.
My counter to this is that such an occurrence was increasingly likely starting around the time the massive US Evangelical base was essentially fully captured by (and became a wing of) the Republican party. It was more and more obvious over a period of at least 40 of those 60 years you mention.
But if you prepare for a crash to happen at some point, that's just good sense. Only a fool would think that there would never be a crash. If you arrange your finances to withstand a crash, and there's eventually a crash, then that was the right thing to do even if it took a long time.
Ensuring the independence of your nation is more of the second kind. And it pays off even when there isn't an outright crisis. The policy wasn't "wrong" for decades. It was fine the whole time.