From the OP, it seems the filters don’t flag CSAM. They flag any NSFW. That said, keep in mind that the filter would also have false negatives, so if people want to slip NSFW though, some can end up there even without such option.

But I don’t mind the content staying hidden until a mod reviewed is in such cases. The false positive rate of the filter would likely be small, so there wouldn’t be too many things that need review.