I am some non-zero amount interested that a Facebook friend of mine liked or commented on some random post. I’m not as interested as something that they posted originally, but clearly non-zero interested in many of those.
That's perfectly fine. Me personally, I am not at all interested in it. But Facebook could very easily allow us to tailor our individual Newsfeeds to our liking, so you can have what you want and I can have what I want.
But that's not what Facebook wants, so that's not what we get.
But that's not what Facebook wants, so that's not what we get.