Those platforms you're sourcing the photos from presumably have content restrictions, which causes the "nude" tag to be dominated by photos without any humans in them. For example this flame: https://taken.photos/photos/2568745/
Well, there was a bug in my data migration/cleanup script for tags. Thanks for catching.
The 'curated collection' statement means 'there is no adult or NSFW' content. AI does great job with detecting nudity, and as a pragmatic person I decided to keep all scraped adult content and have it served at https://nudes.best/