You can’t have the internet and the first amendment and not have social media, and I’d suggest both of the above are beneficial.
But more importantly I call bullshit. If something, anything, is proven to be extremely deleterious to peoples health and also to the democratic process then you absolutely can write laws banning it specifically. Eg. you cant build your own nukes or biological weapons at home. That's how laws and constitutions work.. they are developed over time as things come up.
Without that you do not live in a democracy, only an authoritarian state where the ruling class permits you to discuss their conduct only as they see fit and out of the goodness of their hearts, and permits you to vote only for candidates holding positions they pre-approve.