It's a classic 'black swan' event, this one, with low probability and potentially high severity.
Human nature tends to screen out very unlikely events (it had not happened to the captain during many flights before, why should it happen now?), but that does not mean that they are absent.
No harm (i.e. injuries/deaths) arose from this incident and possibly some good, in terms of applied learning about flying with prosthetics.
A lot of the learning in the airline industry was paid for in blood, fortunately this one was a free gift
