People here often post like that about incidents discussed here, even tho something about the dive really might have caused a medical event. Who knows? Some here like to pretend that scuba diving is as safe as golfing in clear weather or bowling, but I don't see that as true at all. (Eh, I wouldn't try either of those today with this knee.) As my original scuba instructor (for my OW card, not my Discover course) said 18 years ago, "Scuba is a potentially dangerous sport that we try to manage safely."
At least there were two crew members still onboard when he climbed out for his event and were witnessed "using the AED and compressions." There is usually only one aboard for my usual diving, and about all he could do is radio for help and maybe drag me aboard after ditching my gear, then head to the closest dock to meet an ambulance driver - who might not have any medics or machines onboard. I don't expect an AED or compressions when I am diving from pangas, out farming alone, or hiking alone. I do carry a PLB everywhere and a pony on all dives deeper than 30 feet (I've done a CESA from deeper when I screwed up once and air left to inflate and blow my whistle), so I do what I can to manage risks safely.
We may well never see his postmortem results. It's unfortunate that he had to go so young and with minor children while some of us who are luckier than we deserve and get to play with great grandkids. Life goes that way at times.