Luck only lasts so long. You don't last long at sports like this if you aren't cautious and well-trained, that's for sure.
I'll offer a counter anecdote to yours: I was talking to a guy this weekend who had been a serious hang-glider for over a decade when he was younger. Every time a friend would have a problem, he analyzed it and saw that because of the way he operated he wouldn't make the same mistake and could therefore rationalize his continued participation in the sport. Eventually though, he had a problem, he made a mistake, it scared him, but it took fully two years of continuing to fly before he finally worked through it and decided that he could never eliminate enough risk and quit flying.
EDIT: I may have mischaracterized his response and removed "error-free" language and clarified with "eliminate enough risk".
I'll offer a counter anecdote to yours: I was talking to a guy this weekend who had been a serious hang-glider for over a decade when he was younger. Every time a friend would have a problem, he analyzed it and saw that because of the way he operated he wouldn't make the same mistake and could therefore rationalize his continued participation in the sport. Eventually though, he had a problem, he made a mistake, it scared him, but it took fully two years of continuing to fly before he finally worked through it and decided that he could never eliminate enough risk and quit flying.
EDIT: I may have mischaracterized his response and removed "error-free" language and clarified with "eliminate enough risk".