Here's what recently happened in Romania, all through TikTok.
Turns out China (or here, Russia) infiltrated the country, waged an enormous disinformation campaign and succeeded by getting their chosen candidate elected. Without TikTok, this would not have happened. I have talked about this with Romanians who concur.
In the real world, there are two responses to this.
1. "Tough luck, it's too late now, should just stand by and watch the country get taken over".
2. "Ban it and future popular big platforms controlled by a foreign adversary".
That's it. We'd all love for something inbetween. It's not happening, all such options would end up becoming 1). That's the state of the modern day world.
The facts that
A. They seem to rather abandon the app rather than receive tens of billions by selling it
B. "The Chinese government also weighed a contingency plan that would have X owner Elon Musk acquire TikTok’s U.S. operations"
C. The remaining mountains of evidence that it is a CCP tool
Mean that the arguments of Congress here are valid and this is the right decision. It is a tool directly controlled by a foreign adversary, for geopolitical, not profit-oriented, purposes. This is nothing like the PATRIOT act or other moves by governments that claim "protect the children" or "protect against terrorism" for some ulterior motive of surveillance or worse. It might be a rarity, but in this case the claims by Congress are factual and a sufficiently good reason.