I do blame your training. It's ridiculous the amount of full cave divers coming from Florida who dove only in mapped caves with easy or no restrictions and believe that just because they can look good while laying a line they can explore 1km+ into caves.
I had the misfortune of diving with a group of Floridians this year and they almost killed me so I am a tad subjective but they did set my mind that half of your divers are overweight, panicky and have no business doing anything harder than walking up a flight of stairs.
Caves in the Med or central Europe get the same amount of traffic as the ones in Fl, yet we barely have any certified cave divers dieing, and close to 0 from medical issues.