>>1317960
Probably because people forget about that shit, and fanciful stories are much more memorable and entertaining.

>>1317960
Why do you assume mythology is 100% false and made up?

>>1317960
It's just a metaphor bro, you're not supposed to take it literally.

Because nobody wants to sit around and listen to a guy regale you with the story of the wonderful history of your dirt-farming ancestors. Stories about heroes and gods and adventures are a lot more engaging, and it's a lot more tempting to associate yourself with an epic past than a boring one.

Besides, we still mythologize our past even today, albeit to a maybe more rational extent. I'm sure that no matter what country you were born in you've got a few larger than life heroes in your nation's past where it's just more memorable to tell the slightly exaggerated version, and people are always more eager to retell the really kickass story about x person they heard even if they don't know for sure if it's true.

>>1317960
>"yeah a long time ago, I'm not sure how long, we used to wander the country side killing whatever animal we could find until somebody learned we could grow food and here we are today"
Make that the message of a game of broken telephone lasting thousands of years, told generation by generation rather than instantaneously from person to person, and by people who don't know what the hell lightning is other than the fact that is terrifying.

During the Bronze age collapse much of knowledge of the past was completely erased and forgotten. Greek myths of Hesiod and Homer are basically the only leftovers from this once great civilization that ceased to exist, and for the large period of time they served as the only available written sources around which the Classical Greeks centered their culture.

But myths are generally fun and easy to memorize, and they also serve as a bonding tool for linguistically/culturally similar peoples. Even in Egypt where the Sea Peoples were successfully defeated and where drastic erasing of information never happened you had very developed myths of pharaohs hailing from gods and other cool stuff.

Also don't forget that the sacral elements were vital in the creation of ancient civilization. You have a world where people see gods everywhere, in the sky, in the sea, everywhere. It's not surprising that in such world priests are considered being the most wise. First rulers in the Sumerian cities were most likely priests. For hindus, Brahmans, the priest-caste, are the top of the toppest in society even to this day.

>>1317960
Kids would fall asleep if you don't spin a tale to tell them.