Imagine how much success the people who try to pull wartime scams on people would make if they simply joined the art community and collected that success as artists. Like at https://archive.ph/FDMos (I notice they are accustomed to the fact people won’t pay attention to how the content they are showing is AI/props, as shown by the recurring figures/text and the fact one of the panoramic views doesn’t hold together).
Are you asking why the project Lemmy doesn’t do it’s own content moderation or are you asking about the content moderation of a specific but unnamed instance?