You only explained how they justify it and the drawbacks of these platforms. But it's not the vague language of a law that allows social media platforms to cens

You only explained how they justify it and the drawbacks of these platforms. But it's not the vague language of a law that allows social media platforms to censor "privately". You can try and change these laws and there will come another legal justification. These tech companies are not independent or subjects of the state simply taking advantage of legal loopholes. They are a part of the state apparatus. The state is who holds power in a society, it isnt just Congress or the president or senators or a pair of political parties. They censor because it is in their own interests to. Their platforms are designed to enable this and they work with the state to determine what gets censored. Any private, public, or non profit company that is not collectively controlled will turn itself or be made into a tool for censorship and/or espionage for its own preservation. These are the great american interests.