1. As a US citizen, you would probably not a get permit necessary for entering the Tibet region.
2. If you could get a permit for Tibet region and go there, you would be followed by police officers dressed in civilian clothing. The locals would be quite hesitant to speak to you.
(Source: been there long ago, seen it). China has many qualities, but freedom is not one of them.
I don't think the poster you're responding to is writing in good faith; they're either an agent of an authoritarian power, or blind to the difference of being one.
People in China can say anything the government approves of, but they can't say "long live freedom and democracy," unless they want to be executed.
Neither, I suspect, will Chinese AI models make any statement in sympathy with personal freedom, democracy, or human rights; it would come at the expense of the people who paid to train those models, and that can't be allowed.
As a child of immigrants from the Soviet Union, and also as someone who knows people still resident in authoritarian dictatorships: This is patently ridiculous. Everything else in your post is a spray of nonsensical policy points and predictions. You led off with the tell. Frankly, it makes everything you say afterward sound like what an authoritarian enemy government would want people in the US to think about their own country.
What you wrote in your first sentence is either (a) wildly misinformed (like, you have no idea what life is like in an authoritarian country with actual slave labor, which is an insult to the people who do currently live there), or (b) intentionally nefarious (like, you work for such a country, in a capacity to minimize the distinction between their system of autocracy and the United States' democracy). If it's (a), study at least a little bit of the history of mass murder in the 20th Century. If (b), well, we live in a free country so you can spew whatever garbage you want. Interestingly, we have not been overtaken by any of the dictatorships that have sprung up in Eurasia over the past hundred years, and I don't think we will be soon.