but how do you know that the crazy distractions of the modern world aren't growing adolescent brains in ways yours will never grow?

Throughout history adults have always looked down on children, yet the upcoming generation always ends up surpassing their parents achievements.

This reminds me of something Socrates said, over 2 millenia ago:

“The children now love luxury; they have bad manners, contempt for authority; they show disrespect for elders and love chatter in place of exercise. Children are now tyrants, not the servants of their households. They no longer rise when elders enter the room. They contradict their parents, chatter before company, gobble up dainties at the table, cross their legs, and tyrannize their teachers.”