The funny thing is I think you're misunderstanding the scale. You wife likes videos that are not-so-obviously staged. Somone else would get purely staged videos. Someone else would get actual real videos. If you like real pilots landing planes on runways where the wheels make sudden noises, it will give you that.

There are tens of billions of pieces of content there. TikTok is the furthest thing from a monolith possible.

It has to start somewhere, so it recommends the things that the most people like, but it's not the only content there, that's just common sense and good business (recommend The Beatles/Taylor Swift before you recommend Arch Echo/Aesop Rock)