Well, credit to your due diligence on examining my post history. However, your assessment is incorrect. A lot of what he talks about are the things you can learn in a variety of training classes. They are things that I'd hope anyone who accepts the responsibility of carrying a firearm daily has already learned. That was the case for me.
There are a couple of reasons that I frequently steer people his way. First, he provides a unique, valuable, and free service with his YouTube channel. (You clearly see the value in aggregating those clips.) Second, lots of people have significant misconceptions about defensive encounters and self defense. The posting history you mentioned is me responding to people (often new and inexperienced people) who are looking to use a folding knife as a primary defensive tool. That discussion is my own. I don't know whether John specifically explores it but between general lessons and exposure to the spectrum of real defensive encounters; I'm hoping to both reinforce my point about folding knives and help people to find better options.