If you think you can judge anything that happened in these incidents without any knowlege or experience in diving, let alone cave or ccr diving, you're way off. You have no idea what students can or can't do from behind your computer.
This HF thing is not new. I read plenty of his stuff and and will continue to do so. I have messaged back and forth with him about one case were I disagreed with some of his take. He is a normal dude you can talk to and disagree with, not need to put HF or him on a pedestal. HF is a model and not hard science or the bibel, reasonable people (that know something about diving) can disagree on how to apply it in a given case.
It's essentially the same concept you learn about in rescue class with some stuff added put in fancier language, it's not very complicated.