You have to use it a bit and interact with it to find the content you like. My guess is that people who like it have done this and people that don't haven't yet found their niche.
I think this might be it. I remember my first interactions with Tik Tok to be full of teens lip-syncing songs while preening on camera. I'm still not a regular user, but now whenever I open the app I actually see people from all walks of life.
