And I don't mean that I will make sure my kid won't be able to consume such content because it is censored or dubbed down to please Chinese markets, kid's to small to understand, but to the increasingly crappy quality of these shows.
That is the point this episode of South Park very deliberately avoids talking about.
Nobody's stopping them from creating art. Really is, unfortunately, putting constraints on which kind of art is going to get bankrolled by millions of dollars of say, Hollywood money.
Those constraints have always been there, and will always be there.
Want free speech? Don't ask for other people's money... They may have opinions about what you should say, using it.
It's just that phrasing the issue as:
"My artistic freedom to make whatever art I want, AND to make millions of dollars in China is being infringed upon by China's domestic policies."
Doesn't sound particularly noble...
The law does not compel you to censor your art. This self-censorship is driven by greed, not legislature. If you aren't interested in selling in China, their laws on speech have no impact on you.