The related issue is parents are overly protective of teens and don't give them enough independence. You see this in a lot of different ways from parents wanting to text their kids, to only letting kids do highly managed structured activities, to treating teens as their best friends, to helicopter parenting protecting kids from all adversity, etc etc
And a similar thing happens not just with parents, but society, there are not a lot of places teens can just hang out. A lot of fun things teens would do increasingly ban minors.
If you want teens off devices, you need to give them alternatives