I already posted this same point above, so I don't know if your post is directed at my post or someone else's. It seems to be at mine, so I'll respond. Also, I've spent many years working in China and running a large organization there, so I have a pretty good understanding of what's going on there.
Everything you've posted is obvious. I don't disagree with any of it. Frankly, the banning won't "reveal" anything. Everyone already knows this is the situation that is happning. But, this is not the real issue. If we ban Tik Tok, it's just like banning Chinese semiconductor chips. Probably warranted. As I said above, the real issue is the creep of these types of government actions against products and services that affect in some way free speech, and the rules of comerce for those products and services. Because if there is one thing US citizens have learned over the last 200 years is that unchecked government power tends to abuse.
There absolutely is a first amendment and commerce question/issue. There's no need to run some thought experiment. We already have countless examples right now where, because of national security concerns, China and the US are banning or requiring alterations to products: semiconductor chips, software, etc. The point with Tik Tok is where is the line drawn? Is this the line? Is there another line? Because theoretically every single software product produced by both countries could get banned in the future because of national security threats. And that gives the US government the ability to control free speech of any software product that they deem being used as a weapon to influence the minds of citizens, or collect personal data, or spy, etc., or unfairly ban any product for any reason under the guise of national security. So as my post pointed out above, right now we are either on a path to potentially banning everything in the future...or maybe there can be ways to establish rules, requirements, and laws that hit at the heart of the security and free speech issues. One could argue that the banning of Tik Tok is essentially the beginning of a ban on any Chinese software product ever. Maybe that's the right decision. But it will have significant consequences for US companies operating in China that are having some level of success.
And oh by the way, because I've been a pretty strong anti-China advocate on this board since the beginning who has seen the worst of China's behavior over and over in the past 20+ years, my personal inclination is to absolutely believe the US government when they say this is all about national security. BUT, given our government's track record for being nothing but bought politicians, I would not be surprised at all that a big part of all of this is also because some powerful tech interests are damn scared of Tik Tok's potential to take control of billions and billions of dollars at stake via social media applications. Facebook sucks, YouTube has matured, SnapChat has plateaued, and Tik Tok is it right now. It's naive to believe it's all about just national security. Just seeing Trump flip to supporting the app because of his relationship with a Tik Tok minority owner tells us everything.