Earlier quoted context omitted.
To your edit: broadcast TV wasn’t under FCC jurisdiction because they paid to broadcast. The public over the air spectrum are considered to be owned by the government and licensed to the broadcast networks
I agree it's not an exact match for many reasons (including because TV didn't let many people broadcast). Phones are a much closer precedent - both phones and social media are tools for person to person communication.
There is no such limitation in someone setting up servers and connecting it to the internet and creating an alternate social media platform. Are there not enough conservatives with the finances and knowledge to create a Twitter alternative? I’ll gladly over charge them and lead the effort if they pay enough. Leading infrastructure and back end development is kind of my thing.