Well I am not talking specifically about reading and writing. I am talking about the concept in general.
People who only and constantly use AI to take a shortcut to reach some outcome rather than learn to do it themselves will likely fall behind in the long run and perhaps learn a lesson from having chose that route, and then have to spend some time actually learning the thing if they want to catch back up.
The risk is eventually we have fewer and fewer good horses to pull our collective weight. This is the entire idea of education and higher education: to create a surplus of technically literate people who go on to lift all boats. The entire concept of AI would never have materialized without these technical people. The opportunity cost of losing potential technical people and the inventions they could produce is incalculable.