That's exactly what the parent was saying.
> China's benefit to encourage moves in both directions
It's disingenuous to suggest that people are talking about tiktok because they think it's just an inherently divisive app. If people want to ban apps that polarize people, twitter would certainly be higher on the list.
"It is to the US's benefit to encourage the Chinese people to learn about democracy."
This is true. And it is a reason that the CCP has banned western social media. These facts do not require any specific action by US authorities to pressure US-based social media companies to carry it out, because those platforms are full of pro-democracy content already.
> It's disingenuous to suggest that people are talking about tiktok because they think it's just an inherently divisive app.
I didn't. There are many reasons people are talking about TikTok, depending on who it is and what they care about. There's not even a single US government view on the matter.
You are arguing against a claim that the parent did not make.
It it true that political polarization of rival nations is advantageous. It is also true that filter bubbles do this naturally. There's no need for the CCP to tell TikTok to politically polarize the content they show to people.