Now about "Everything comes in parables". That's not the same as "parables come in everything". The first tells you that the truth in Genesis comes in a parable. What you are saying is that Genesis is true with a parable in it. Not the same thing.
Everything does not come in parables, and for a philosopher there may be a parable in everything, whether invented in their own mind or not, but the literal Word of God in Genesis is not some mystical, fuzzy, indecipherable mumbo-jumbo for pointed headed deniers of reality to obfuscate with their lying tomes.
The parables of the creation are not found by denying the reality of the Word of God and His truths in the what, when, how and why of creation week, but only in beginning with His literal truth of the creation as He had Moses simply write it down.
Moses was a man of high scientific education and had access to all the learning of all the wisdom and science of the Egyptian high technological civilization of his day. He certainly knew about the universe and creation itself from his own access to earlier writings, like the Book of Enoch, which Book the ancient Egyptian wise men were taught and given, by Abram, only forty years after the dispersion of the tribes at Babel's tower's fall.
Abram spent forty years living with Noah and Shem, while hiding out from Nimrod, who wanted to kill him. In those forty years Abram received all the instruction of the writings of 1 Enoch, which Noah took with him on the ark. This information is found in the book of Jasher which Moses wrote as a redacted history of the patriarchs own writings and of his own history; until his death, which book Joshua completed and then began his own history of the times.
But you seem to believe that Moses was a dumb and ignorant man with no writing skills and certainly no knowledge of earth's history before his time. By reading the ancient writings and the Bible, one learns that Moses was learned in all the science of Egypt, which nation rose to great technological achievements in a golden age under the reign of Joseph, who ruled for the Pharaoh's son and before that as second to Pharaoh, for eight decades; and who led Egypt in victories over all her enemies and conquered the nations round about, during his reign.
Under Joseph, Egypt prospered magnificently, and it was not until after Joseph's death that Egypt went astray and began an anit-Israelite policy which resulted in enslaving the tribes [but not the tribe of Levi], until Moses led them out, which was only one hundred thirty years after Joseph's death; and YHWH destroyed Egypt's greatness and prosperity totally, by the ten calamities upon her nation.
Before Moses led Israel out of Egypt, he served as the king of Cush/Ethiopia for forty years, as the ancient histories state.
This Moses then was called to serve as king and prophet for YHWH to the people of YHWH's own name, Israel; and he wrote the redacted history of the creation in Genesis, and he wrote the redacted stories of the patriarchs' lives in the "Book of the Upright"="Jasher", whcih he further redacted for Genesis.
To claim that Moses was ignorant or that God was too dumb to choose a man to write His message to His people is absolutely arrogant assumption of one's own superior understanding and wisdom, and shows that one knows nothing at all of truth and has nothing to say about God's Word, His plan, and purpose for creation.
Book of Jasher