It's a tool for curating the content, upvote posts you want people to see, and downvote those you think should be hidden. So stuff that's irrelevant, factually incorrect, pointless, inflammatory etc.
Thinking that something should be hidden just because you disagree with it is problematic.
Addendum: Yes we know that you think ml/hexbear/grad are tankies and or .world are a bunch of liberals but it gets old quickly. Try and come up with new material.
It's a tool for curating the content, upvote posts you want people to see, and downvote those you think should be hidden. So stuff that's irrelevant, factually incorrect, pointless, inflammatory etc.
Thinking that something should be hidden just because you disagree with it is problematic.