In fact, Section 230 was passed explicitly because of successful lawsuits against forums and websites hosting user generated content.
https://itif.org/publications/2021/02/22/overview-section-23...
> The court held that although CompuServe did host defamatory content on its forums, CompuServe was merely a distributor, rather than a publisher, of the content. As a distributor, CompuServe could only be held liable for defamation if it knew, or had reason to know, of the defamatory nature of the content.[2] As CompuServe had made no effort to review the large volume of content on its forums, it could not be held liable for the defamatory content.
Section 230 basically erased the distinction between publisher and distributor.