The argument seems a bit hysterical, it's not like everyone is forced to use TikTok, they can get hair tips, learn about Gaza, or get whatever views from TikTok, or Facebook, or Twitter, or Twitch or...
American's would have the freedom to choose what social media they want to consume, now they are forced to only have one controlled by a US billionaire.
the point is that US has clear and direct influence to twitter/facebook/instagram algorithms and recommendations and they can suppress one topic or another. it is not the case with tiktok, and this is primary reason for this ban