Section 230 is the reason for the current situation. It allows youtube to host many videos and the internet became centralized. Then they decide that they will censor someone or some topic they don't like.
If tomorrow they remove section 230, and youtube cease to exist as is right now and everyone starts to self-host it will become quite impossible to deplatform anyone.
Pedantically, people would take physical responsibility for the process of hosting their own content and substantially more moral responsibility for their own content. People already take legal responsibility for their own illegal content. What Section 230 does is minimize the risk of having to take legal responsibility (and/or de facto financial responsibility) for someone else's content, with exceptions regarding federal crimes, sex trafficking in both civil and criminal contexts, and intellectual property.
