This - I think this also extends to the conversations people have 'on' facebook - even with friends. You end up liking or saying 'cool' to a post, but you don't really have any real interaction. Since I've left facebook (nearly 9 months sober) I've probably talked with fewer friends, but those friends I have spoken to, I've spoken to on a far deeper level. and many of them I now actually _speak_ to more often.
Uninstalling messenger was hard at first, as some people I don't have a number for or they aren't on Whatsapp, but you either find other ways to keep in touch, or you realise that you were actually just on the periphery of each others lives, and liking that they got a new car or similar didn't actually have a positive impact on each others lives. And when you do meet again, you'll have a bunch to talk about.
I've debated making a 'fake' account for facebook groups (esp local sales groups, which seem far better served on fb in my area) but so far I've come the the conclusion that I don't really need to buy more crap from strangers - I have enough of my own already.