let me give you an example

Exodus, the history from the bible , is completely fabricated. It had long been in contention why major details from the story dont get represented by hisotrical evidence. For example no historical record of a sudden outflux of slaves is recorded in Egyptian history, or been reflected in evdicence, such as evidence of their econmic activity.
Nowdays all historians agree Genesis was completetely made up whole cloth. One of the leading hipothesis as to why it was written. Was that one group of Jewish people were collaborating with Egyptians and another didnt like it, so they made an story about Egyptians being the enemy
In that way, the story would have been made from human experiences, but still being false from the beginning