It's possible that China censors info about Tiananmen square because so much of what was published came from Western news orgs - and the West has form for using the "news" to attack other nations. Another example might be the supposed "genocide" of the Uyghur people - the MSM pushed the genocide narrative hard, while radicalising, funding and arming Uyghur Islamic extremists, so they could control the narrative. And of course, it largely worked.
This is more a political discourse that a business or technical one.
You sure can establish that there is a qualitative difference on the type of censorship carried out - congrats.
The main point I spelled out is that there is no comparative advantage (technical or business wise) on working on these products in the west as you have to implement and operationalize the same amount of censorship / safety.
In the US there is 18 U.S.C. § 842(p).
In the EU there is the entire AI Act.
But I am sure you can yourself chat your way through to figure out what legislation companies like OpenAI and Anthropic are under.