>>>This is already becoming more evident in our
Actually, our world is more dependent on written text than ever to support the technological infrastructure. For example, somebody has to write all that C++, HTML, and JavaScript code -- hundreds of millions of lines, billions of characters -- that makes all the web magic happen -- and document it so it can be maintained.
But in your fantasy world, you can create any rules you want --- as long as you can also make the audience suspend disbelief. Which obviously, is not happening with me. But I'm only one person; others' mileage may vary. And I am a certified PITA (pain in the ass), someone who tends to kick the tires on a story premise. Hard. Very hard.
That being stipulated, why would writing be forbidden in your dystopic world? What problem does writing create for the BBC (Big Bad Corp) that it must be extinguished? IOW: What is the dramatic causal relationship between the disappearance of writing and the tyranny of the BBC.