I think part of the problem is that now, the cart is ahead of the horse.
X, FB, Instagram...have gotten so large and with really no controls over content (hiding behind free speech) and so many have gotten used to being able to say anything (even getting positive feedback thru "likes" for really inappropriate comments) and it starts to create this "feedback loop (not unlike in an ecosystem, which social media is kinda like).
when that feedback loop is operating in a detrimental way, it simply continues its decent. Folks will continually push the social norms/acceptability, get more likes and the next person will up the ante to get more likes.
And here we are.
20 years ago folks talked about some of this crap in private. And if there were 10 ppl in a room and 8 didn't agree with the premise, they either said nothing or spoken to the other 2 privately. And that's pretty much where it ended.
Today, if it's controversial enough, it doesn't get suppressed, it actually gets amplified.
And you aren't having to say this in person, to a bunch of people standing around you. It's pretty anonymous and if too far, delete it.
It's a mess. But installing guardrails NOW is going to a heck of an achievement because those same folks who feel liberated to post every dumb thought and get some satisfaction (likes or even getting into arguments) will claim it's free speech infringement.