Kev, I'm not saying you're wrong at all, but you have to consider the audience we're talking to generally in this forum.
I know you have your billy-badass (yeah, I'm the man) diver photo up as your avatar, but you have to consider how the bulk of the rest of world dives. You may want something to be taught as a mandatory skill, but the fact of the matter, it's not. I agree that people should be taught how to reach around and control their tank valves, but again...it's not generally taught. In my experience European divers are the worst trained and barely have any idea that there is a tank of air strapped to their back (oi! I have European stories if you want to hear them).
Unless you're going to write a paper explaining why your approach to training methodology should be changed, it's not going to change.
In that light, we should work with "what is" and try to enlighten people about some of the simpler methods of self-extraction in situations as are presented in this post and geared for the audience expected to read it.
That is, if they find themselves with a wonky second stage at depth and they can't clear the problem in short order, they should don their octo and surface (preferably letting their buddy know in advance).
I don't mean to disrespect you, but I think you're taking a rather arrogant tone here.