But that's the whole point, isn't it? A lot of the time it is just luck. Maybe if the Alaska Airlines crew had not had their elevator screwjack completely fail - just mostly fail, as it had done - they would have got back and been heroes. Same goes for the Concorde crew - if they had rotated a little later - and so on.
I don't know about the rest of you, but I have been in spots where I really should have died, and to this day I can't be sure whether it was my "skill", or luck, that delivered me safely to a nice, friendly runway. I like to think the former, but suspect it was the latter...