I once had a disagreement with a friend. The issue was that another friend had pranged doing aeros with fatal results for both pilot and passenger. I dared to suggest that, in the absence of evidence to the contrary, he had probably ballsed it up somehow. My friend was incensed that I would say such a thing. My opinion was, and still is, that none of us are so good that we can't balls it up. Having accepted that, the goal is then to try and work out why a well regarded pilot can end up in a situation where they don't perform as expected and then try to learn some lessons from it so that we can each be a little safer.