The question is whether an occurrence can solely be put on one event is questionable. It appears that our national pastime is playing the blame game and to shame the alleged perpetrator(s) in the hope that if someone can be pinpointed to have caused the gaffe, we can put closure to a catastrophe. And they hope to prevent the shortcomings in future.
It all sounds noble but unfortunately life is not so simple.
Not every bad incident has a simple etiology. Most often than not it is multi factorial. Like in Murphy's Law, when something is doomed to go wrong, it will go wrong. Airline industry have considered a 'no blame' policy but to identify the precipitating events and to take a collective approach to improve safety.
That reminds me of a small civil court case where a minor road accident had occurred. A driver coming from the opposite side had hit him at a traffic light. The aggrieved driver insisted that he was right as the traffic light on his side was green. The learned judge decreed that he also had to take 20% of the blame as it was his duty too to ensure that his lane was clear before he started moving!
