Earlier quoted context omitted.
In China, political dissenters are "de-platformed" (what a nice weasel word for "censored") by companies as instructed by the government; in America, they are censored by companies as instructed by angry mobs. It doesn't make as much a difference as you think.
I live in China. It makes a very big difference. "Angry mobs", as you put it, are just ordinary people freely expressing their opinions to companies that they choose to do business with. No company is forced to comply with the requests of an "angry mob". No government agency is going to punish a company that doesn't comply. Nobody is getting thrown in prison for something they said online. Please, it does a disservic…
We were talking about people being banned/censored/"de-platformed" from social media companies, in China and in the west. I'm aware that, otherwise, human rights abuse are way worse in China.
As for the idea that abuse only matters when done by a government, it's absurd. We're seeing now private companies talking about censoring the US President, so it's pretty clear who has most power. You can hide behind technicalities like them being private companies or whatever (I note that this argument does not hold when a small mom and pop company refuses to bake a cake, but apparently much larger companies can do whatever they want), but it just means that those companies have the power to censor speech _in practice_ (which is what actually matters in the end), and at the moment they're following angry mobs and not elected officials to define those censorship policies.