Yeah, it's a bit stupid making that jump, even if it's a form of protest.
Personally, I don't think it will be banned. TikTok is one of the only popular social media sites not formed in the US, so I reckon this is a ploy to lower the stock prices for the US to potentially buy it at a bargain.
Same thing governments have typically done with crypto over the years. Talk shit, price falls, their friends buy, talk positive, price rises.