a) the Chinese goverment is right
and b) TikTok is notably worse than American social media.
I, for example, disagree with both. I think the Chinese government is wrong about a lot of things, including the right way to raise kids. And I think TikTok is no worse than Instagram.
The Chinese government is right in the sense that drug cartels generally avoid getting too high on their own supply.
Germany dropped bombs on the UK. The UK responded by dropping bombs on Germany. By responding in kind, was the UK therefore asserting that Germany was 'right' to drop bombs on the UK?
If the UK justified their actions solely on the basis that because the Germans did it it must be ok that'd be unreasonable. (This isn't the right forum to get into it, but the ethics of civilian saturation bombings are much more complicated and I'm not saying either was in the right, though of course in total Germany was far far worse).