It is obvious to me that they were writing down exactly what they were communicated by God or his Angels. Based on these Biblical dates and time I sincerely believe God, whatever his image and calendar timeframe was, did create the Earth and everything in it, but he also created change and gave humans an analytical mind to improve, call it “evolution” if one must, the Earth and all that is in it. I call it Creation with built in change factors.
The only problem I see with your observations is that why, if God created the universe in a different way than Genesis states, why the genesis rigamarole. If God could take 13.7 billion years to "create" the universe, why couldn't he wait several thousand years, until "his image" was able to understand the universe, to have Genesis written in a way other than figurative. Does let there be light mean the Big Bang?
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969