How do you know these activities are all “perfectly legal”? From my understanding, they are taking issue with organized misinformation campaigns. Those are, at least potentially, illegal. It probably isn’t productive for the govt to waste time with the volume of posts. But going after the organized criminals behind some of it, could be both productive and useful. The problem is this is a major source of revenue for Facebook and Twitter, which is why they sort of dance around it a bit, their incentive isn’t really lined up with cleaning up the platform (obviously the criminal behavior from the inorganic “Stop the Steal” movement and 1/6 was a short term impetus for them to boot some of these bad actors from their platforms).