That is to say, there are no absolute guarantees in certification - only probabilities. Most of the time it works adequately well, most of us would opine very well. Sometimes the pilot really needs to know a bit about the background to make sensible decisions. Sometimes it all goes awry and we all die. So long as the last situation is very remote, I don't think that I'll have many sleepless nights worrying too much about the distant outliers on the distribution curve. After all, we did make it safely to the airport on the roads without getting killed .. and that was, by far, a much riskier process to endure.