I feel like all of this debate is painfully missing the point. The problem is not some content moderation policy, the problem is that social media has changed social conversations from small local interactions into monstrous virtual fight clubs between millions of people simultaneously, and where the most extreme opinions are rewarded with the most attention. Boring level headed opinions used to at least have a chanc…
... Because they were heavily promoted by the people who owned the media platforms. It wasn't because of any of their particular virtues.
Consider your bias when making this claim. What makes an opinion boring and level-headed? That it is squarely in the middle of the Overton window? Who sets the Overton window, in the pre-social-network world where the overwhelming majority of media is state/corporate-sponsored?
It's not some natural evolutionary process that caused boring, level-headed opinions to rise to the top. It was self-serving opinions rising to the top, that, because of their ubiquity, are believed to be boring and level-headed.
When viewed from a different cultural lens, many of those boring and level-headed opinions appear completely batshit insane. For example, the current American model for healthcare seems, for the most part (Everyone has a few minor tweaks they want to make - but setting that aside), boring and level-headed and reasonable to ~half the country. To the rest of the world, it appears completely insane, and anyone proposing switching to it would be a complete lunatic. In the US, however, the converse holds - switching away from it is considered by many to be absolutely crazy.
Which of those opinions is the reasonable, level-headed one? It depends on your current social setting, not on the virtues or drawbacks of the expressed idea.