People would start writing more and getting better at it with the help of LLM. This would create a positive feedback loop that would encourage them to write more and better. LLM should be used a tool improve productivity and quality of output. Like we use a computer interface to write faster, move and edit text, instead of using a pencil and an eraser, today you can use a LLM to improve your writing. This will help people to get better at organizing their thoughts and think more clearly instead of replacing the thinking.
If I were teaching at a university, I think I could not assign essay grades until i sat down with every student for a quick Q&A on the subject of their paper. That would reveal the plagiarists and charlatans and lame non-thinkers.
Everyone uses voice interface, so writing is looked as an antiquated habit.
If AI trains on generated text it is equivalent of an incestuous relationship and I don't have elaborate on analogy further.
As opposed to the writing at one end, these thoughts are rooted in an experience, an emotion, and this association never dissapears. Add the above act on them, it is like writing.
Maybe the author is referring strictly to communication or to the art of writing.