Earlier quoted context omitted.
Personally I've been alienated, and many of my non techie friends have been too, but the network effect is just too strong and pulls you back in when old-so-and-so plans their birthday party or whatever.
That's it. I use it purely for answering invitations to events and a handy address book. Otherwise my social media time is away from FB, though, I still spend time on FB in the form of Instagram.
Although your comment makes me wonder if there is a space for a more specialised 'events' app. Maybe this is where the Google/Apple calendars are vaguely headed.