The first amendment and the resulting USA would be my prime counter example. The US wasn't an accident, freedom of speech is a hard requirement for free people and letting companies censor people "for our good" is antithetical to the nth degree.
If people want to advocate for nationalizing social media and forcing platforms to publish speech against their will, and making it illegal for them to moderate content, then they shouldn't pretend they're doing so in the spirit of the first amendment or what the founding fathers envisioned free speech to be.
It's a commonly spread fallacy that only "publishers" are allowed to moderate content, and "platforms" not. The entire purpose of Section 230 is to allow platforms to moderate user-submitted content without facing legal liability for doing so. Social media platforms have always been allowed to do exactly what they're doing.