There was certainly no intention on my part to undermine Yihui's work and effort.
I assume the main issue you are having with my statement is with "there isn't much of it" phrase. So, I guess I must elaborate.
I only meant that the core crucial documentation of the blogdown guide is concise enough to be read attentively in one sitting. This isn't to say that the documentation is sparse or limited. On the contrary: it contains everything one needs to know, and it doesn't take as much space as one would expect (we're talking about deploying a static website from scratch with no prior knowledge. Brick-sized books are usually dedicated to this. Even the full guide in 144 pages is pretty concise for a task like this, in my mind. Especially since it covers everything necessary)