Even if they have references, the website might no longer exist or they reference into another document that tells it in a book which you need to know the title to find such book and read the book but that one told you the reference is from a foreign forktale and books of that very cliche story aren’t included on popular literature. That’s when you ask lots of people who have knowledge of said topic to help continue your research. After like hundreds of books you discover a scroll detailing the history of the reference in ok kinda way but leave everything up to you. Afterwards when you got all the information in s neatly styled modern day understanding for Wikiapedia, it gets rejected and you just decide to sent it to someone or keep it until wikipedia stops being a jerk about their rules for newer versions.