My parents did this when I was growing up but it only handicapped me because I was interested in coding and didn’t have enough time to learn to go to the competitions I wanted. And I learned that coding was bad because my parents kept a strict time limit on it while other things were encouraged.
Maybe it’s difficult for me to see the benefits of a time limit when I think it has done more harm for me than good. It would make more sense to limit harmful apps and websites but not time from my perspective. But everyone is taking about time-restricting.