ScubaSteve
Wow.....what a DB
They might have known they were diving above their training, but they certainly thought they had enough knowledge to pull it off. Dunning-Kruger at its finest.
Could better training centered on truly developing diver skill and knowledge, augmented by solid equipment/gas choices and dive planning help people out? I certainly think so. I do not think that most cave classes are geared toward that. The end result is someone with a cert card who thinks they are at pretty good, when they aren't. I've seen this first hand on multiple occasions, and its kinda sad and tragic, a little.
But if Ben was trained to a standard at or above Agency requirements and he chose to pull this schat himself, then how is that the fault of his instructor? You seem to have placed blame on his instructor assuming that they did not train him well or warn him enough.......sometimes stupid is stupid. A dumbass is going to do whatever they want no matter what warnings an instructor gave them.
Setting the bar higher might improve the caliber of certified divers at each level but it will not prevent stupid people from doing stupid things.