People as it is have a Negativity Bias. Facebook/Twitter/Youtube's biggest content producers use it and depend on it, to hit their engagement metrics. Elevating threat perception or a fight response doesn't require censored content. Once you build such a machine that operates at population scale, what does it matter which content is censored?
All the content is fucking everyone in someway everyday. And the effects of that accumulate over time. Just ask your friendly neighborhood shrink whether business is booming.