Well, for that matter, the guy's a chiropractor and I don't buy chiropractic theory. But I believe he's correct on glute/shoulder function and the erroneous cues we've been getting. I like the overall approach of proper movement preceding integration into exercise. I suspect that a great many are probably not ready to pick up a barbell.
The strength and conditioning industry is as prone to fadism as any other industry I can think of. It needs voices in the wilderness. And it needs people who are willing to listen to those voices and filter as necessary (ex: vibrams vs. proper cues).
Back to chiros, I believe the neck-popping, etc., is a form of witchdoctery. On the other hand, for my knee I saw a respected ortho and he told me to do terminal knee extensions and take glucosamine. In other words, I traded one form of neck-popping for another form of neck-popping.
What are you going to do ?