But shouldn't that concern go the other way? If the Chinese government is dictating content policies of TikTok, that should obviously be a concern, but I have not seen this alleged.
Granted collecting say interest data based on viewing figures would be a precursor (I suppose it's likely that TikTok could figure out if a customer leaned left or right politically). But again that's not what the complaint is about.
It's also hard to ignore that TikTok's responses are at face value reasonable (such as evaluating touch patterns to identify bots... that's obviously something they have to do given the predominance of bots on social media platforms).