Earlier quoted context omitted.
For me, Facebook is unquestionably a net positive value. I get to keep tabs on friends without actively having to reach out. So people don't become strangers over time. I can discover events around me and expand my social circle. I can be start a business with a free web presence and attract customers. The downsides that are mentioned are deteriorating discourse, misinformation, false expectations and social pressure…
Unquestionably? How many of those "friends" that you keep tabs on have you talked to recently? And I don't mean leaving a comment or reading about their lives. One of the most dangerous negative effects of Facebook is that it makes people _feel_ socially connected to someone when they really have no social interaction or connection at all.
I don't see how the number of chats I have is an exclusive measure of value of that platform. That is but one metric.