We have a finite amount of time and energy to maintain connections with people. Even shallow connections eat into that. I'd rather spend that time and energy on deeper connections. And while it's customary to say "but sure, I guess other people have different views on this, so to each their own", I... well, I honestly believe it's unhealthy to obsessively try to maintain all these sorts of shallow connections. I think this is a part of why I read about how so many people are lonely these days and have trouble forming friendships and keeping them going.
I rekindled a friendship with an old friend when I realized he was visiting the same foreign country as I was. Funny enough his wife is a mutual college friend of ours whom he had lost touch with but only met again after reconnecting on social media. I also reconnected with her through my friend.