[PhantomGremlin]

This speaks to flexibility and information density inherent in text

That is true, however, the only reason there is such "information density" is that you already know the meanings of those words, idioms, assumptions, etc. You know a lot of context that isn't being explicitly stated.

That quoted sentence has little meaning to a child or to anyone without a good deal of education and shared cultural background.

Diagrams and text serve very different purposes.