> because chinese society / us people are well connected (in real person)
Most Uyghurs don't even speak your language. That generalization of well-connectivity doesn't apply at all. Unless you speak Äynu, you are likely talking mostly with Han Chinese in Xinjiang (or Uyghurs who had undergone severe Sinicization).
> It's almost impossible to hide any major events in China, even with large scale blockage
It is impossible to hide "major events" only when jounralists are free to roam around in China.
I have a jounralist friend whose grandfather was a Chinese war hero (i.e. he is a 红三代). He is now a US citizen, and works for a respectable news media. He had internal CCP connections but were denied Chinese visa when he was working on the Uighur story in 2017. This had never happened before, even when he was investigating the controversial story with Bo Xilai.