It only just now that I thought to look at basic boxing skills videos, and it looks like without having had any formal boxing training and after giving a couple of lessons myself over the past two weeks, I pretty much nailed it. Both boxing and judo consist of very few techniques and principles, with the rest being practice. I don't know how people make it so complex or why I used to be so confused about things. I'm starting to see some things much more clearly now.
The guy probably has a point in that if you don't invent complex issues there is not a lot to talk about. In boxing you just need to teach, what, 4 punches, how to move, how to guard, how to further train and then trainers can find their own way. That is not a lot of work.