It's not social media per se, it's the authorities or people in power.

10 or even 5 years ago, you could have debates on every controversial topic online from abortion to atheism to lgbt to healthcare. In comment threads you would literally see every side of the debate. But something happened fairly recently where social media got weaponized for political reasons. And "blasphemy laws" got established on social media platforms. What's interesting is that the same "blasphemy laws" are on every platform as if a pope or an authority figure sent out a decree that everyone had to obey.

Now there are even well funded "hit squads" to attack or shame people for wrongthink. But I think their time is coming to an end because more and more people are getting tired of censorship.