You know, its funny to me how all of these accident threads degenerate in about the same sequence of BS.
First, you get condolences and well wishes.
Then, as some more info comes out, you get victim blaming.
If there is a suspected "medical event" comes the fitness nazis who want to tell you who should not be diving based on age and BMI.
Agency and certification bashing gets thrown in along the way, along with instructor shaming as if you have to call and ask your instructor to approve your every dive plan.
We always criticize the volunteers that expend their time and money to perform recoveries for not spreading more salacious details. Then the agencies that do the recoveries for not filing reports to your liking, usually the CDS or IUCRR. It annoys the hell out of some of you that the recovery divers may discuss things with close friends, but not you.
Scattered in along the way is attorney bashing, not that it may not be justified in some cases. Also in the mix is the group that believes that their "right to know", that doesn't exist, is more important than the deceased and their families right to privacy.
The cliche group always have to post something. "Know your limits". People don't, never have. "Dive within your certification". People don't, never have. A lot of exploration dives would stop if they did.
"Know your PO2." Half the rebreather accidents prove that people don't. That is not the fault of their instructor or certification agency or manufacturer.
This whole scenario just replays on an endless loop every time we have an accident.
Are there lessons to be learned here? Yes. Don't follow a line if you don't know where it goes. Just because you are sidemount certified does not mean you should cram your ass into every passage you see. Learn how to back out of a silted out passage, its not easy. What more are you trying to learn from this?