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?
Me too, but I wasn't on AOL or anything long-distance, instead I called local chat systems / BBSes. And because they were local we met up physically as a group at least weekly (almost daily in the summertime).
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.