I will never be a cave diver, but I find the stories of cave diving tragedies both educational and humbling, especially because there is more information and lots of discussion. These people all have way more experience than I do, yet they still have some failure in planning, equipment or luck that leads to the unfortunate results. It helps me to realize just how little I know and how easily things can go sideways, and so for that I appreciate threads like these.
For what its worth, I have story about unqualified divers and caves:
I got my open water certification at Vortex Springs. The group consisted of 2 OW students, 2 AOW, 2 divers working toward their master cert, and 1 instructor. On my 3rd dive I was face to face with the grim reaper sign in the cavern, and I can say that the sign had a big impact on me and removed any curiosity related to going deeper. So clear signs can have an effect I think. I was buddied with one of the Master Divers, but this thread makes me wonder if I should have even been there in the first place.
That night the instructor took the 2 AOW and 2 Master divers deeper into the cave, but told me and the other OW student that we didn’t have advanced training so we couldn’t go, which was fine with me. I have no idea how far they went or whether it was safe or not, as I am not familiar with the site. They did comment on all the large eels, and my impression is went beyond where we stopped that morning, but I could be wrong. This thread makes me think that dive was a big mistake, especially if there is no such thing as 'cavern' at night. One of the AOW students refused to do a mask clear drill earlier that morning, which to this day makes me wonder how he passed OW and what would have happened if his masked were knocked off on that night dive. I have decided to do the rest of my training with a different shop/instructor.