I don't understand where your comment comes from, to be honest. I use Facebook a decent amount, and every single post in my feed comes from a page that I follow, a group that I'm in, or a friend.

I think the issue is when your friend Bob shares something from a page that you don't follow. People seem to blame Facebook for showing you irrelevant content, rather than blaming their friend Bob for sharing it. People share things on Facebook with the intent for you to see it. If you don't like it, then block the page Bob shared from. If Bob does a lot of sharing, then either unfriend him entirely, or at least unfollow so his crap stops showing up in your feed.