The idea that repealing Section 230 will do anything beneficial is beyond absurd. The only thing it would accomplish is consolidate more communication in silos of companies like Facebook. Typically vague laws are a detriment to citizens, for instance the "indecency" portions of the CDA got struck down because "indecent" and "offensive" were not given definitions in the law. Section 230's vagueness is actually a boon for the citizenry.
While everyone wanted to reference Facebook et al with regard to Section 230, it's really everyone else that really benefits. Because you don't personally own a bunch of Internet infrastructure you have to rely on third parties to host pretty much anything you put online. Neither centrally hosted or peer-to-peer hosted material would be viable without Section 230 protections.
If you want to put up a website, it's either going to be hosted at a service provider or going through a service provider if you try self hosting it. In either case, the ISP is not the publisher of your site, you're just using their infrastructure. Without Section 230 protections no ISP is going to want to do that because they would then be liable for whatever you did with your site. Peer-to-peer hosting isn't safe either, one successful lawsuit against a last-mile ISP would lead to all of them actively blocking upstream services.
This ends up spilling over into any content not generated by the hosting entity. So no more GitHub, mailing lists, help forums, or even wikis. Even product/service ratings on websites will disappear. For all the bad shit that might get removed from the web an untold amount of net positive things will also end up going away.