I suspect most of the critique even back then was around teaching from static written text, not the writing itself. In my experience that aligns well with modern education theory.
It's not that they didn't see the usefulness of books, it was more so about the overreliance on them and the effect it had on the education students would come away with, just as you say. A pretty reasonable concern, I think!
As an aside: One of the techniques students would be exposed to was the use of memory palaces, which remains helpful to this day where everyone has a computer in their pocket. Pretty cool stuff - technology of the mind!