This is not about low quality content getting automatically filtered out by an algorithm because people don't like it. This is about TikTok using human moderators to prevent users from ever seeing content made by people they don't like.
TikTok doesn't care who made it; they care how the video looks.
There is plenty of extremely high quality content made by people who appear fat, poor, old, disabled, ugly, etc in their videos.
No different than the editor of a newspaper or television show.