Oh but they do, or at the very least carefully steer what you see by demoting certain subjects; don't forget that only in 2020 their internal moderator policies were leaked, telling them to suppress posts by ugly, poor and disabled people [0], or suppress streams that "harmed national order" or "defamed civil servants". Sure, this was the Chinese branch of tiktok, and the US / EU based version has distanced themselves from it - already mostly being its own platform. But this is where they came from barely four years ago.

[0] https://theintercept.com/2020/03/16/tiktok-app-moderators-us...