These are somewhat orthoganal - young people are lonelier != everyone else has a fixed supply of friends and can never make more.
Nor does it change the fact that the author, who clearly does want to socialise, would benefit from doing something outside of their tech bubble and widening their horizons beyond "things that could conceivably further my career".
> the fact that the author, who clearly does want to socialise, would benefit from doing something outside of their tech bubble
I am not in SV and i don't have a single irl tech friend. OK, maybe just one.
Most of my friends would agree with me and with article author. One of them goes further and doesn't even have a smartphone.
IME techies very rarely have these concerns.
So I'm not sure who is in a tech bubble between me and all those people in this thread saying how the logic is illegitimate because the author doesn't go out (which I guess is a "fact" because they all know him personally lol)