You actually can nearly do that. Facebook inexplicably showed me how a few weeks ago. If a friend reshares something, you'll see it, but it removes all groups, etc. It was stunning how little content actually comes from friends.
On the Facebook site (I'm sure it can be done via app, too, but I didn't look), click on the menu near the top right, then click Feeds (under Social). Then click on Friends on the left.
These here are some Yankees!
How did a city with such a great airport end up at the bottom of the ocean?
I was living in Georgia when this aired, so it really hit home. My favorite episode by far.