If it’s a private company that con do what it wants, like blocking political opponents, it should not be under safe harbor protections.
That’s the point in yelling about this. If Elon wants a private forum for him and his mates, he should also be fully responsible when his mates posts child porn on his servers.
A lot of sites have weight. Twitter sheds users every day but the large user count makes it attractive to public figures and if you want to follow that public figure you need to have twitter.