My Twitter feed is basically the news. The first 4 of 5 posts are from established news organizations or about current events. Social media vs news media is a distinction without a difference.
The distinctions are actually fairly profound and include established practices and professional norms concerning information sourcing, verification/due diligence, and editorial discretion. This is all before the agent-principal relationship, contractual obligations, and regulatory oversight to which news organizations are subject.
I understand why Zuckerberg needs to make the false equivalence, but we don’t (necessarily) share his profit motive and can be more objective here.