Social media companies are beholden to advertisers. Advertisers are beholden to angry mobs. As long as this is true, social media companies will continue to restrict free speech, then will justify their restrictions under the guise of "safety."
To be clear, mean words don't cause a loss in safety. Tribalism can lead to a loss. But more dangerous than both of these is the damage that such thought-policing and fear-mongering has on our democracy. It amplifies divisions for no reason.