Obviously how a social media platform moderates itself has virtually nothing to do with 1A. Limiting or eliminating section 230 would place more legal liability

Obviously how a social media platform moderates itself has virtually nothing to do with 1A. Limiting or eliminating section 230 would place more legal liability on the platforms over users' content. They would have a much greater incentive to limit users speech whenever there is the slightest risk of putting the platform in legal jeopardy. The fact that social media platforms aren't considered "publishers" means that the financial benefit for having a quasi free-speech community overrides their legal risk.