People seem to forget that China is a fully authoritarian state. The fact is that China is an adversary and blocks virtually every western social network, including YouTube, Instagram, and Wikipedia: https://en.wikipedia.org/wiki/List_of_websites_blocked_in_ma...
The CCP has absolute authority over internal companies to bend them to their will, and regularly disappears political dissidents including tech leaders like Jack Ma.
TikTok has over 150 million users in the United States, skewing young. We have seen the massive misinformation campaigns from other adversaries like Russia, with the goal of sowing dissent and malcontent.
All it takes is leaning on the algorithmic levers. Today the controversy may be over the issue you are passionate about, tomorrow it will a different issue, the only thing that matters is that TikTok is an open door to unduly influence public opinion in America.
The immense scale of data collection, from personal information to location tracking data, is also a clear concern.
Anyone that thinks it is reasonable for a geopolitical rival to control this company, especially a country known to reach its hand deep into company policy, is incredibly naive and self-sabotaging.
TikTok must be banned or fully controlled by a US based company.
When a parent tells their child not to touch the hot stove, they want the best for the child. When the child does it anyway, the parent hopes that the lesson will be instructive for the future.