That's kind of the issue. A lot of them are committing suicide. Many more end up permanently scarred. Mental health issues are no joke. The author, Haidt, will himself recommend the concept of anti-fragility. Which is essentially toughening kids through gradual and manageable amounts of adversity. Yet even he sees no value in social media for this process. In other words, social media is not a net good for kids. They don't end up more well-adjusted as human beings.