An interesting thread, notwithstanding some of the conspicuously off-topic diversions (politics, and the walks down that all too well-known street - Memory Lane - in that equally well-known town - Fantasyland).
The post that started this thread described some very unfortunate diver behaviors. And, while it is easy to assign responsibility to current training practices, and put on the rose-colored glasses and remember the past glory days, that doesn't address the issue very effectively.
Divers have access to good training in 2019, across multiple agencies. Whether they choose to take advantage of it is up to them. Complaining that training has been watered down, or 'McDonaldized', or that instructors are not as capable or rigorous, is easy. But, doing so possibly misses the important ingredient - the attitude and mindset of the student / diver.
Likewise, equipment doesn't make the diver. The diver makes the equipment (function well or poorly, depending on their attitude and skills). The video that chilly posted was excellent in that regard. Certain types of equipment may make the job a bit easier. But, the diver determines that.
Some years ago on SB, Jim Lapenta made the observation that there are underwater tourists, and there are divers. Someone who wants to be an underwater tourist may not be as focused on skills, and buoyancy, and trim, even environmental awareness, as someone who wants to become a diver. I can't change the mindset of the underwater tourist, although I can try to be a role model, as a diver and as an Instructor, to at least help them see other possibilities. I can be, and am, responsible for my own mindset, and my own skill set, and my own behavior underwater. While I would probably be just as frustrated as the OP by what he described at BHB, my best reaction would be to not be part of the problem.