Please address the actual argument, namely that in the US, when you hand platforms to people like Zuckerberg, you don't need to do any actual censoring because American business leaders change their political opinions in line with the sitting administration the way other people change T-Shirts. That is the point of the sale, anybody who is not utterly gullible can see it from a mile away.
On a Chinese owned TikTok Americans get information presented to them, whether intentionally or authentically, that the US powers that be do not like. There is no other security argument, data was already managed by Oracle in the US, the app was technically separated from its Chinese equivalent Douyin.