In 1969, at the age of 9, I could be left to play with my friends and wander several miles from home without any sense of danger. Days were occupied with spports or just hanging out then reading and TV in the evening. There was balance because we had less technology. The ageing mill towns of East Lancashire, UK, still enjoyed a culture of trust and respect for your neighbours such that you could leave your front door open without fear of theft. Parents stressd "playing out" and being "out of the house" but it didn't stop kids from achieving academically.
The thought of hiding in my room and hardly ever seeing my friends face-to-face would have been soul-destroying. Chess, games, cricket and football was life itself in my teens up to about 15 when the music scene and girls became the main fascination. These were all social activities and I can't imagine those glorious teenage years spent hidden in my room staring at a phone screen as a substitute for real human contact. It's unthinkable.