Jonathan Haidt has an excellent article that changed my mind on this topic:

https://www.theatlantic.com/magazine/archive/2019/12/social-...

I think the problem with social media is that the loud crazy voices that are usually confined to the corner streets in cities can now shout all the way around the world.

A simple fix would be to limit the distance a ‘voice’ could travel to geographic boundaries that are a function of population density.