You do realize you are writing this on a social media platform, right?
If a newspaper publishes a 'letter to the editor' that is libel they are liable because they chose it to publish. that's what the big tech social media do.
If section 230 got repealed it would have effects on sites like HN, but the would be catastrophic for big tech social media.
Is that not a large part of how most social media algorithms work?