Constitutional right to free speech does not equal a right to a platform for that speech. Disinformation should not be legally prosecuted but, it's absolute horse shit to claim that social media companies owe it the same indifference as the government does.

Stop conflating the legal right to free speech with the (non-existent) right to use someone else's platform for said speech.

Much like screaming FIRE!! in a crowded venue, there has to be a limit on free speech, and that limit is typically when it causes harm to other people