So more specifically, again it's that this is uncharted territory. It's great that he has the capabilities to own a capable submarine, but again I don't understand why he doesn't instead fund scientists who have devoted their lives to the field, rather than poking around himself. Sure, it's his money, and he has nice cameras... but let the experts handle it from there, is how it seems to me.
I already said that it seems I'm underestimating his abilities, but to reverse things, I wouldn't expect an underwater geologist to be directing the first epic documentary film on some brand new and hugely important discovery just because they have money and time to explore film seriously in their free time. And I'm sure some scientists wouldn't want to expose themselves to any of the risks involved if something were to go wrong.
It just comes across to me that way, that's all I'm saying (in a non-hostile way). The matter at hand seems too important to hand over to a rich guy with a serious hobby, even if he is really good at what he does and has good intentions.