I think that technical dive training has to be much more difficult PER DIVE than regular recreational training of course. But also needs to just as more productive as well in terms of educational benifit to the student and not entertainment for the instructor
The best you can do actually is video of a team running a line, with multiple failures "occuring" using an air gun (and slapping too, of course).
Before, it used to be black mask this and black mask that, turning off valves by surprise and all that horrid stuff.
We can get the same results in terms of stress without touching the student and giving the student the time of his/her life with a great learning experiance, only possible after a professional video debrief.
This approach helps produce thinking divers with better perception of their true abilities as a team should something go wrong during a dive.
That is just my opinion, but a lot of people dive pretty well after getting their butts kicked old school style. I mean some of that stuff was just sadistic man.... I am sure I would not want to get served some of what I have dished out before changing my evil ways.
Also, you would be suprised how much break and rebuild happens in the class room. Instructors across all agencies actually will use all sorts of terms and phrases to slowly make students commit to a certain system.
Also and most commonly, is trying to show "ownership" of certain skills or bits of theory being exclusivley taught within only this agency.
So part of the break and rebuild is actually regular assimilation. Sounds bad, well it is
It all comes down to holistic concepts like the "run time plan" which is a total mind warp for most people once they start using it. Same with the VR3 for that matter, with it's nasty way of rearranging deep stops to manipulate buhlman calculations for shallow stops, creating a profile with a different outcome that gets people "hooked" on the VR3 and insecure in using other computers.
We as instructors know that we are dealing with beginners in comparison to ourselves in most cases. I personally choose to make this a benifit to the student.