Well I think people at the top consider China to be special, same thing happened with the sale of Grindr to a Chinese company. That was stopped by the US government because it could easily be used by the CCP to do bad things like blackmail Americans.
I do believe that both sides of the political spectrum agree that there is a special threat posed by Chinese involvement in American social media. This TikTok ban was pushed forward by both sides of the aisle and has had support from people in both administrations.
Social media in general is ofc toxic and terrible for all kinds of other reasons, but WRT national security TikTok is so huge now that it’s getting special treatment.
Seems to me that this strategy is as best not earnest and at worst only serves those in power.