You bring up an interesting point that I thought I'd chime in on. In no uncertain terms, I agree with you 101%. Jason would agree. And every other artist on our team would agree. You CAN learn this by study of Erdnase, and that would be a great start.
However, Jason does not sit in the video and dictate Erdnase's words for 35 minutes. The value of these 1-on-1's - the reason why they are such a valuable learning resource - is the one thing that these artists bring that is NOT in any book - experience.
Jason brings 20+ years of experience of not only using the move, but sharing tips through the years with Richard Turner, Steve Forte, Chris Kenner and many of his other close friends. You can't put a price on that - it's invaluable and adds an entire new dimension to the learning process. He shares common mistakes, angles, special tips, and even shows some additional learning resources at the end of the video that stretch well beyond the 5 pages of Erdnase.
That, I believe, is where the true value of these 1-on-1's reside. And that's been our goal with them since the beginning.