I understand the sentiment, and in the short term I agree with you (what can a foreign-controlled tik-tok going to do to us?). But think giving influence to our online behavior directly over to an adversarial foreign-power doesn't sound like a good idea. To me, it reminds me of WWII and the codebreakers in England who broke the German codes. They didn't use it to decode messages all time, because they didn't want to alert the Germans, only during significant events. Yeah, control over a major social media outlet could be a tool to use selectively during important events to influence the masses. Not in a good idea in my opinion, but am no expert in this.