Not sure about you but my TikTok algorithm just shows anime hot takes, quick facts about world events, and a goat named Billy Earl who can't stay off of the neighbor's damn house.
If all you see are pranks and dances it's probably what you went on there looking for.
It's easy to blame the user for what the algorithm selects, but unless you go search for eg "math", it's difficult for the algorithm to decide you want to view any of the content that's harder to digest than the trivial dance videos. Given the app's roots, it's not surprising it see's dances as the primary content to start surfacing to new accounts to start engagement.
If all you see are pranks and dances it's probably what you went on there looking for.