If they can ban tik tok, they can ban signal or briar because those also might send your encrypted data overseas or because their use among "violent" protestors is a risk. How about VPN apps that siphon your personal data to china and russia! Haha
Here's the thing, US bigtech complies (in secret) with US intel community just like tik tok complies with CCP's MSS. Matter of fact, I happen to know with certainty and with first hand accounts that the US intel community offensively uses american made apps and services to spy against naturalized law abiding americans on american soil just as they would with a foreigner working for the CCP in China.
You might say, China bans US media companies so US should as well. And I will say to you that's absolute nonsense. China is a totalitarian orwelian nightmare state and the US is supposed to be a beacon of liberty and freedom in the world. The US can ban tiktok's usage amongst US government and military and anyone that does business with them. But by what right do they get to restrict communication, an unregulated non-financial interaction between americans and anyone else?
If americans want to be spied on by China in exchange for being able to use tiktok it's their right and this activity is beyond the reaches of any elected government. Even if there is a law allowing congress or the president to ban tiktok, this law is overriden by the bill of rights that restricts the government from making laws that constrain speech and communication between citizens and anyone,and that guarantees tiktok due process and a trial before being found of any wrongdoing. Congress can however restrict commerce, as in financial transaction and for profit activity with tiktok and advertisers, what congress or trump have no authority to do is to tell americans and tiktok they cannot communicate with each other. Freedom of speech is meaningless if no one is allowed to listen to you.
This needs to be done right. Do not throw away your rights by creating a precedent set by the supreme court that lets government restrict your speech. These sneaky bastards will always worm their way into slowly taking away rights from the people in order to preserve their social order.
I don't like tiktok and if you care to go back far enough into my posting history you will see how much I hate the CCP.
What is given can be taken away (if your right to communicate with a foreign entity is given by the government). And if they can ban one app,banning others is a matter of legal mental gymnastics.