My context is that I was born in the late 90s: The main thing that lead to me prioritizing using the computer and playing with people online over in person was one of convenience. My parents did a really good job at making it a massive pain in the ass as a young teen to have a friend visit, or vice versa.

"Hey can I go visit X?"/"Can X come play?" "what time? did you already call to ask if it was ok? What did their parents say? Who's going to drive you, their parents or me? how long? Our house is too messy for visitors."

Very quickly I got sick of having to play 20 questions. It was far easier to just add my friends on skype, spin up hamachi, and host minecraft servers for us to play together online. No exhausting negotiation sessions with my parents, no worry that the scheduling won't work out, I just get to play.

Definitely not a universal experience, in that regard. But I think its definitely a component of it. Why bother trying to fight for the permission to be independent out in the world, when you could be digitally independent far more easily?