The Tiktok algorithm we have rewards repetitive dancing in front of the camera, pulling ("fake") pranks and random snippets from movies edited together with dramatic music added. In China (their app is called Douyin), the algorithm rewards things they want their youth to be doing. Content which involves maths, engineering, medicine, etc are rewarded. I'm certain that there is some strategic motive from China to push…
For example, many of my videos for a long time were basically short essays about current events, relationship advice, (edit: BIPOC) creators, interesting skits or stories about Marvel or DC characters and so on.
Silly dance junk and pranks are certainly not what I see. There is _some_ dance stuff, but it's in subgenres I'm interested in and so I've given those the watch time.
You can curate yourself to things you're interested in. It's not that hard and it's strongly recommended.