It’s not theater. Just calling something security theater isn’t an argument and the fact that Congress passed bipartisan legislation to ban it after internal security briefings should at least cause you to question your assumption.

The other key point you are missing is that we can ban one app and then ban/regulate others later. You don’t have to do it all at once even if all organizations were engaging in the same behavior.

Even more - the process and legislation required to just ban/regulate Meta or other American tech companies for example is more difficult not just because of the actual legal apparatus required to make it happen, but because of economic considerations and jobs and such too. Further, no doubt the CIA, NSA, and FBI all but have offices at Meta headquarters. They might be engaging in activity or influence campaigns we don’t like - but that’s for us to figure out, not some other country.

TikTok is just some random company that doesn’t matter outside of engaging in activities we don’t like and we choose to allow it to do business in the United States as we see fit.

As casually as we can decide to allow it to do business in the United States so too can we revoke that permission. We do this all the time. We recently stopped Nippon Steel from buying US Steel. TikTok isn’t anything special.