It's jingoistic and sinophobic since the purpose of the "work against" is to strengthen your own team's position. By and large, Chinese human rights activists do not think banning TikTok strengthens human rights in China.
Yes, it's true the good things it does at home are mandated by the government.
Yes, it's true that in foreign countries those same mandates would be difficult and in some cases (maybe the US?) unconstitutional.
However, that's a logical argument which doesn't speak to the heart of the disagreement: TikTok could do good in foreign nations, but it explicitly chooses not to. It'd be easy for them to copy and paste their policies from China into other countries, but they work very hard to fill the feed with entertainment because it makes more money.
It can’t be any of that! No! It must be sinophobia!
> Chinese human rights activists do not think banning TikTok strengthens human rights in China.
Source?
While I agree with you. On the face, it doesn't seem logical that banning TikTok in a foreign country would make things better in China. Even if TikTok were a pure propaganda arm ala Voice of America, it still doesn't have much to do with the treatment of people at home (where by the way it has 'good' policies to foster the development of the youth).