> Facebook doesn't "help people from across the world keep in touch".

Well, that's exactly my personal use case for FB, as well as that of many people I personally know irl. It genuinely does help me and my friends to stay in touch. We don't browse the feed for hours or anything (I open FB maybe twice a week for 20-30 mins tops, and that's only because I am also checking up on a few hobby-related FB groups I am in).

Could it be the case that this is NOT how most FB users use the service? I mean, sure. Still would be wrong to say that it doesn't "help people from across the world keep in touch," because there is a non-insignificant number of people who use FB for this exact stated purpose, me included.