The general narrative implies (but would never say) that humans lack agency and the ability to act in their own self-interest. And if only we could remove the social media site/system, would we see an enlightened, more perfect human.
Don't get me wrong, I'm strongly in favor of designing systems to bring out the best in humanity. But I think a lot of what we see on social media is a reflection of who we are as humans, and what we desire and want to see. And I don't see enough discussion at the individual level, and why we act the way we do.
If the discussion was at the individual level, we'd start to see our common humanity, and the conversation about social media would be less about moderating out the 'bad content' (which always just so happens to be the content that our outgroup likes), and more about the philosophical considerations with designing complex systems that help humanity thrive (and what it means to thrive).