Yes I had a lot of your thoughts also. He needs to really spend some serious time examining these skills presented at Hanshi Juchnik's seminar.
I had the opportunity to work, over a period of two weeks, with a gentleman who could induce me, and other practitioners to lose our balance. The other practitioners had decades more experience than I, in both karate and kung fu, and our butts all hit the chair he was toppling us into, in a seemingly effortless manner. None of us could really explain it. None of us were falling for him.
In the years that have passed since that experience, I have come to realize what you point out. The interaction with the gentleman was not a fight. Nowhere near.
So yes, the question then becomes, can these skills be transferred into a much more realistic attack with a skilled, strong and determined person doing the attacking.
To me it just reinforces the picture of martial arts being a collection of skills and I cannot favor one over the others.