1. Competitive balance. China does not allow US social media companies. If we allow theirs, our industry is essentially fighting with one hand tied behind its back.
2. China controls the algorithm for determining who sees what. This gives them tremendous ability to influence public opinion, and consequently public elections. That cannot be allowed to stand as long as China is hostile to the US.
3. China gets extremely detailed data about the interests and proclivities of millions of Americans, including military personnel and elected officials. This data is not otherwise publicly available and can be used for blackmail and other manipulation. Which is completely unacceptable when we have no mechanism to punish them from doing this short of global nuclear war.
Even ignoring the enormous threat to national sovereignty, TikTok has no redeeming qualities. It's an addiction machine that profits off people wasting away in front a screen. That alone is not a reason to ban it, but it sure does make the case stronger.
Banning TikTok is a clear-cut positive for the American people. Every American adult should be in support.