I agree that the "why" is often omitted. As an LE trainer myself, I think we owe it to the end user to provide context to an appropriate degree. In my opinion, this company seems to pride itself on teaching context and history, but then doesn't deliver on that unless you take the week-long version of the class.
I mean the whole POI was presented. There were no materials provided. The instructor told me to email him and he'd send some references my way, but no response.