After finishing OW and AOW courses in probably worst probable location (Egypt) it was very clear to me, that I should not enter overhead environments. Even if no one mentioned it to me (don't remember), it was surely covered in books. And as a doctor myself, I am used to trusting scientifically based information. So even during training I was the one showing books and asking to do required skills and repeat them even if I succeeded first time (guess I was very annoying). Everyone is responsible for themeselves, but even the most clever person can sometimes misjudge situation and do a "trust me" dive. But in this situation (it was mentioned, that she was swimming upright most of the time???)no one cared - neither she, nor others. Apparently she thought that someone else is to take care of her and the guide simply didn't care. People are getting more and more "tolerant" in western world. But more often it is indifference than tolerance. I mean, the person who filmed her on the other dives and saw how bad she was, probably out of tolerance said no word about unsuitable diving habits to her? Probably she was equally terrible diver during her certification, but nobody cared either. She thought, that getting certifications prooves she was good enought and people who taught her just didn't care to teach her proper way and let her go the way she was with certifications hoping to never hear about her again. Why bother?