Well said GG.
Safety advice and instruction only played a
relatively small part in the courses I did.
Most of the actual instruction was around sound technique, which very quickly led on to increased confidence, which in turn
and coupled with genuine common sense, leads to a sound understanding of your own skills and a good ability to assess personal risk, in time leading to experience.
I suppose it might be classed as "knowing your own limits" but the key thing is having some foundation to base those "limits" upon.
No one would be wise paddling a sea kayak, without at the very least a practical introduction from a competent sea kayaker.
There's nothing wrong with "having a go" with a lot of pastimes but sea kayaking comes under the same heading on
my list as parachuting, flying, diving, driving etc etc.

Basically, if you don't get shown the basics and prove you have them on board, the chances are you'll come a cropper
Steve