[frollo]

But they aren't. As we see here, there was a pretty solid wall of consensus saying that the sub was a death trap. Heck, the reason why it was the only submarine built with carbon fiber is something an engineering undergrad can grasp at glance.

Not only that, but we have known how to reach ever lower depths for decades now. A human being has already reached the bottom of the Challenger Abyss. We know how to do this stuff and, while there's certainly room for improvements, ignoring the properties of the materials you're using and not doing proper testing is not how you get any improvement done. At best, all the advancement this tragedy will bring is a more comprehensive regulation of this kind of activities. Which is exactly what the original Titanic brought to the world.