You can make the same argument to ban Facebook because of its use by the GRU, and it would be equally silly.
FB is a American owned an operated, but clearly if state actors have access (as they did at Twitter [0]) it hardly matters.
[0]: https://www.washingtonpost.com/national-security/former-twit...
Find actual abuses by the application or its data and then there are credible arguments. Simply alluding to some notion of evil-by-association is a dangerous game for the US to play given PRISM, FISA warrants, etc.
And let's be real -- you're typing on your made in China computer full of components made in China, your data traversing made in china routers and relays, etc. This never had anything to do with any imagined security risk, and had to do with the corrupt manchild targeting a platform for carrying content unfavorable to him. It is just another demonstration that the US doesn't "stand for" much [1].
[1] - The only saving grace right now is effectively the so called "Deep State". The career judges and civil servants who don't twist every norm and rule and precedent because of this corrupt tinpot dictator and his pathetic army of deplorables. They may not be enough, though.
Would you feel different if TikTok were software of Russian origin? I suspect you would.
It's telling that one of the most common, and earliest, comments to justify a TikTok ban is "well China banned/blocked XXXX". It is similar to this administration repeatedly justifying super-spreader events by citing looters. Is that really the standard you are striving towards?
"Would you feel different if TikTok were software of Russian origin?"
No, I wouldn't at all. That is absurd. Russia actually has a fairly healthy software industry, including many games and even security tools like Kaspersky.