I have taken his online course, and as you say, it is “solid.” I recommend it to anyone.
The interesting thing to me is that we are a part of a continuum. It's not like the latest iPhone, that is the result of 40 years or so of development. Humans were providing their families with meat using the bow 40,000 or more years ago. A relatively small group of Welsh archers defeated the entire French army on at least two occasions about 800 years ago. I think they knew what they were doing, perhaps better than we know today.
So yes, don't pass up any opportunity to learn to shoot the bow better. Just keep in mind that there is more than one way to skin a cat.