No I am repeating a much used phrase in UK flying that together with 'no bold pilots' has been around since Pontious was a pilot.
Do I believe it? Yes, because in my experiience of flying most flying accidents are the result of pilot error and foolish decisions.
I see the phrase as a useful teaching aid but I can see how it may offend some, we all prefer praise rather than criticism, dont we!
Basically it means if you do foolish things in an aircraft you may injure yourself, sounds to me like a gospel worth spreading!