The US ostensibly isn’t banning TikTok to prevent its population from being exposed to foreign criticism, ideas, etc which might reflect badly on The Party. We know this because the US permits lots and lots of foreign media, applications, and websites while China restricts far, far more.

None of this is to say that I think the executive action is a good idea, but there is a middle ground between “a bad idea” and “literally the same as the CCP”.