The social networks are very good at serving this use case - showing most important content first, and relegating the junky stuff further down the feed.
Only up to a point. I have actually missed wedding announcements because the announcement was pushed far down by more recent but less relevant news. Yes, if you use Facebook for 30 minutes a day, you probably won't miss anything. But if you use Facebook less often than that (like an hour a week, or once a month), you will absolutely miss relevant news because it'll be pushed down by whatever political shoutfest is currently drawing comments and reactions.