So what? And I mean that quite seriously.
To clarify, I despise the big social media platforms and refuse to use them even if that inconveniences me (and occasionally it does). At the same time, those platforms have the same free speech rights that I do, and curtailment of their free speech (and property) rights (in this case, the right not to publish/amplify the speech of others) also curtails my free speech (and property) rights.
And since I want to protect my own rights, I support the right of those rapacious scumbags to moderate/censor on their own private property.