I've seen this in other disciplines, and if anything to worse degree. I've witnessed situations where the old masters can't talk to the journeymen, and the new masters can barely talk to the beginners. You learn by watching and whatever the people a couple years ahead of you can decipher for you.

To make matters worse, what often happens is that the instructors believe they have taught something, and they don't witness the actual learning take place, so they continue in their belief in their practices.