The diver is taught all the skills necessary for being a cave diver, but only 10% of the skills necessary for being a sidemount diver. Sure, they were given some brief discussion and instruction on how to set up the rig, but not really told why.
Bad training is bad training. That isn't specific to sidemount only. One would hope that any conscientious cave instructor would
know what issues needed to be taught - irregardless of whether the student were in sidemount or backmounted doubles. If they didn't... one could only hope they'd refrain from offering sidemount tuition until they could provide an equal outcome to what they do already in backmount.
I can't speak for every sm course run - but for PADI and ANDI, at least, there is a wide flexibility for the instructor to run a 'clinic-like' approach to sidemount theory. That allows (a good quality) instructor to dove-tail the sidemount training into the overall progression for overhead etc.
They weren't given additional skills on removing bottles, reconnecting bottles when approaching restrictions with sharp turns or elevation changes.
That wouldn't be included on a basic sidemount course... but neither would it be included on an equivalent equipment (not overhead) back-mount course. I'm thinking here that the sidemount should equate to an 'intro-to-tec', 'doubles familiarization' or 'advanced nitrox' sort of level. Basic equipment procedures and configurations. Cave training is cave training. THAT's when "dealing with restrictions" should be taught - if that's what's in the syllabus and/or a performance requirement for that level.
They were simply shown how to set up their gear. Have they received the proper sidemount instruction? Nope, because the instructor doesn't know everything he needs to know just because he's done a few dives as part of his Sidemount Instructor Cert.
I agree with you on this. As an example, PADI haven't even yet released a manual or DVD. That means a few (very few) experienced sm instructors are providing courses for a multitude of instructors
and instructor-trainers. PADI are signing off those newly qualified pros to teach in rapid order. The latest 'Undersea Journal' boasts of the interest in SM...some 500 instructors signed off since May 2012 (when the basic course was released). Obviously... with a small pool of "experts" and a long trail of fast-track newbie sm instructors/ITs...and no manuals/materials... it's a bad case of Chinese whispers and degraded knowledge continuity.
To give you an example of this, I spoke with a sidemount diver who was cave diving a few weeks ago that didn't know he should be switching bottles back and forth. Breathe off the left one for 300 or 500psi, then breathe the right tank for 300 or 500psi.
That's as basic as basic can be. It is (even) mentioned clearly in the PADI SM instructor notes. Proper gas management
should be mastered in confined...dive #1...day #1.
It is compelling evidence (and I've got a dozen similar stories) that the rush to promote SM has caused a gross dilution of experience.