HN is working fine; different sub-groups segregate under different topics. People who care about Rust comment under threads about Rust, people who care about science-fiction post comments in threads about science-fiction. And people who care about politics post under threads about politics.
Then the question of "why threads about politics usually have lower quality of comments" is left as an exercise for the reader.
Then the question of "why threads about politics usually have lower quality of comments" is left as an exercise for the reader.