It's basically China's version of "free speech is dangerous". Whenever someone starts saying things the CCP doesn't like, they are "fomenting dissent".

What people don't get is if you want to start censoring "dangerous speech" then you'd better have a perfect definition of what dangerous speech is. But there isn't one.

So what ends up happening is you ban speech with good reason, set a precedent, then your political opponent takes power and starts banning speech as well.