I think this thread shows a clash of two different training philosophies.
On one side you have the “check box” philosophy where students just have to perform a skill, not necessarily well (Though skills are supposed to be “fluid, comfortable, and repeatable.” Students may need remedial training which may be addressed in the course. Or the instructor may place students on their knees as mentioned here. I didn’t see the video so I cannot comment.
On the other side, you have the philosophy of objective standards. There is a student needs remedial training, they either go practice and achieve the proficiency required before starting the intended course. Or they seek proper training to have those required skills. Only once ready, then students are trained with the new material and evaluated. If they cannot perform the skills at the required level, they do not get certification. In this philosophy, certification cards are not participation trophies. Students may need to go practice and then schedule retesting with their instructor in order to earn certification.
We all know that the market overall is dominated by the former philosophy. For recreational diving, I don’t like it, but I begrudgingly accept it. Not everyone lives near dive sites where they can easily go dive before/after work and every weekend (like me). Most are landlocked and while they may choose not to dive in local lakes/rivers/quarries, they instead dive once in a while on vacation. They demand a checkbox course as they will not have time to practice skills to master them and will likely go to a different dive destination on their next vacation. Even if they were going to go back the next year, their instructor may have moved on.
So ultimately, we have a good versus evil battle here. Guess which one I think corresponds to good and to evil.
Seriously, no one answer that.
I'm not sure I agree it's that black and white. I think there's a significant difference in divers who think that "only when it's important," and "it's important all the time." The first are divers who think it's fine for a technical instructor on an advanced course to allow, and indeed promote, breaking trim and neutral buoyancy whole doing skills because it's those are not important to the specific skill. The latter are divers who think that you never do those things unless it's an exception. One group identifies the action as an exception, one group identifies the action as a rule. Some divers only recognize an exception as viable when it's an exception to some other factor. Some see these as standards violations, others do not. And it appears that there are opinions all along the spectrum between the two, and what constitutes a grey area is different for each diver.
Either way, it's clear that there are distinctions on what people consider acceptable behavior from students and instructors.