I remember being young when "kids don't play in the yard anymore, they just play on their phone/consoles/computer" started to be a big talking point. Even then I recognized that the reason I was on the computer so much was, at least in part, because it was so much easier to hang out with my friends online than it was to coordinate with my parents to try and get travel to their house, or to convince my parents to let…
I agree that people don't give this explanation enough credit. I was online in that age group by the late 80s. Just as in your story, that started me down a path of not going outside as much, even though the other kids would be outside doing outside things. Why would I go out and play basketball or something else I didn't like when I could instead be online talking to people with shared interests?
The summer I was 16 I spent more time away from the computer, hanging out with other teenagers I met on the computer, than I would have otherwise.