That's because TikTok does pretty heavy 'auditing' - the content is NOT organic at all. Only the good-looking people and the happy videos go to the top. The others go to the bottom or are 'disappeared'
I don't know what problem the US has with it then, they've already assimilated, Hollywood would be jealous
https://www.theguardian.com/technology/2019/sep/25/revealed-...
https://theintercept.com/2020/03/16/tiktok-app-moderators-us...
https://www.businessinsider.com/internal-guidelines-show-tik...