And then there is the case of Conrad "Connie" Limbaugh - one of those people who's spirit I try to emulate:
Conrad Limbaugh: One of the first to Dive with Research
One of the first,
no formal training,
literally wrote the book for Americans,
lead the field for years,
died in a cave.
From day one he was diving beyond his training. Was he sensible, reckless, an icon or a precautionary tale. Hard to square that circle. His "mistake" was not diving beyond his training but rather; diving an unknown locale while relying on a local guide. Good thing no formally trained divers of today do that sort of thing.
OK, this guy did dive beyond his training. That is because there was no training then. He in fact helped invent the training we receive today.
Lewis and Clark worked their way across America on horseback and wagons, blazing trails across unknown territory.
That does not make it the best way to do it today. I'll take the Interstate, thank you.