What ?! Kek
While you are right, they did have Zoroastra at his time when he wrote his magus opus In caves where he could have privacy and the space to practice
You seem to be missing the history of Annuakki, the great battle of Tiamat and Marduk (either Enki or Enlil’s son.. I feel Enlil better fit
They created Earth from Tiamat, Abzu (father) sent to waters below in Underworld, and they’re Right hand Knight , to the Moon in Exile
That’s not even including how Babylonian was changed into Sumerian beliefs
Same Gods, just changed names with phonetics ect of times