I wrote a novel that takes place in the near future (2035) and the main character is a 18 year old. I predict that using phones will be banned until you come of

I wrote a novel that takes place in the near future (2035) and the main character is a 18 year old. I predict that using phones will be banned until you come off age and their technology interaction is restricted to smart watches. Social media is damaging to adults, I wonder why nobody has put a limit by law to younger people.