Education, healthcare, and economic stability make people less likely to be angry. Less likely to be drawn to Fox News, and too educated to buy into it..
Kids who are becoming antisocial or depressed, or who just need help, can be identified and treated because of these services.
See countries like Finland. They have access to just as much technology and ability to doom scroll. They don't have the violence or depression problems we have here in the US.
They have universal access to education and healthcare. They have stronger employee protections. They have better social support. That's the difference.
We can choose all of that for ourselves.