My stock response to the "write only" myth: Chinese is a write-only language to those who don't know it.
It seems like you are defining "write only" as a synonym for "don't understand". Which I think avoids the question. If you don't understand a language, you can't write it or read it. "Write only" means a person understands perfectly well what each individual statement means, but piecing together the big picture of what's going on can take an inordinate amount of time. As an example of a "write only" process, consider the act of writing a program for a Turing machine.