You are definitely watching the wrong stuff.
Search for things that interest you snd thh the eye are masses of excellent content.
Some Mumsnet approved topics to try
Gardening hacks/tips
Quick recipes
Cookies
Life hacks
Cats
Dogs
I also watch loafs of horse related videos
The algorithm very quickly learns what you like
I'm sure there are stupid videos in there but then there is a terrible load of crap on TV for every Time, Line of Duty or Buffy
If you just see the odd video reposted to Facebook you are missing out on a load of funny and interesting content
There are not many ads (yet) and it's a very democratic way for people to create content. Unlike YouTube. People can only use their phones.
Open your mind it is definitely more than just people dancing. I never actually see those because it can tell I have no interest (if it shows me them I scroll past and it doesn't show me them anymore.
It's an echo chamber sure, but mine's full of wholesome stuff.