Earlier quoted context omitted.
They would need to explain how TicTok brainwashes americans to vote(or not vote) but Facebook and Twitter categorically does not do the same thing. If "brainwashing" on social media exists then all should be made illegal not only the a small subset.
Thats not really why they are worried about TikTok, it comes back to the issue of the CCP and and that China defacto owns TikTok which means that information can be harvested. This is G5 controversy all over. The brainwashing part is just noise. The real concern is real given Chinas history.
Or at least they didn't, until this happened.
They would care about Tencent or Alibaba, but ByteDance isn't big or important enough for the party to care.