Good lord, man. How do you deal with people you meet in real life? Do you walk around responding "What you just said is irrelevant to me."?
What if the algorithm you think you want is actually the opposite of what you might find interesting tomorrow? Most people are complex, interesting creatures finding new inspirations and communicating them on a daily basis. People grow, change, they find out what is interesting to post. We're in the baby stages of this whole online social experiment.
Regardless of that: I find it's generally _people_ I can choose to hide from my news feed (usually because they constantly post things that annoy me). And with what, maybe one of those people hidden every few months, I otherwise actually have a pleasant experience catching up on what my friends & family have been up to. It's not that complicated...