Combined with the right to communicate across borders, you can get quite a bit of privacy: a server in both sides of a geopolitical conflict and they've got to collaborate to track you.
And yet metadata collection is both unavoidable (if you don't collect it, your geopolitical opponents will) and should be enough. We don't need chat control in a world where I get precision-targeted ads -- it's not even about freedom of speech or privacy, it's about freedom of thought.