"Consequently, all of the panelists felt that there isn’t really a “problem” of divers dying underwater, because some fatalities are inevitable in a sport involving some degree of risk and with millions of dives being performed every year. However, there is a very real problem of divers not following their training or diving within their experience levels, and this is the underlying cause of a majority of accidents. Additionally, medical issues such as cardiac and obesity are an important part of the problem,[11] and divers bear primary responsibility for assessing their individual health and fitness to dive.
Hmmm, what is more important? Training or experience?
There is still no autodidactical way of learning to dive accepted. But I think this can be possible for some people. Also sometimes going diving with friends teaches you more than a new course.
Remember, not that long time ago there was no course for diving an dpv for example, or ccr cave. So people trained themselves. And got experience.
As a lot of countries don't have a law about scubacerts, in that countries mostly you can start you own agency and sign people off. This means the people have a training level on paper, but no experience. So what is more important for accidents?
And what do insurances? They state: not insuranced when diving outside your certification limit.
The other problem is: what means experience? When are you experienced enough to do such a dive? And if 1 diver can do that dive based on their experience level, can everybody do that? No. Exactly, not all individuals are at the same level after the same experience.
Even not if they have done the same amount of training and amount of dives.
Divers are human, that means nobody is the same. That also means that mistakes will be made. Also there will be always daredevils.
There is no redundancy for stupidity. This means, just training and experience still mean that some divers think they are more experienced or more trained than they are in reality.
And even if no mistakes are made, there is a chance of just an accident. You did all right and still have an accident.
This means, in diving, and in every sport accidents and incidents will happen, what the cause will be, they will happen.