The net effect is ultimately positive. Societies are healthier in many ways when people are free to speak their mind.
This is currently not empirically sustained. I hope it will be, in the long run. But if Americans and Europeans keep voting for far-right and -left wing idiots, and China and its similars take the mantle of technological and scientific development, there is a real argument that Enlightenment values don’t apply perfectly in a world with social media and AI.