It's basically him explaining how they (submersible community) all knew that thing was a death trap and that the guy had the completely wrong mindset in trying to rebel against established tactics on safety and worse, though he knew better.

He even comments how they guy invited him to go on a trip and he was like fuck no

What I am learning so far. A reminder to quit if a company breaches your professional ethics (those who quit, lived and were okay). Also American law does not investigate safety concerns properly. Remember that if your using anything from there. Maybe don't, maybe get something from a better safety regime. This was before they lost even more laws and people investigating problems.