You understand that there's a conflict between the Bible and the observable world history,
You have not shown that
And that is my point.
You miss the point. You have not shown with verifiable evidence that the the flood contradicts the Bible. You need to prove that the Noah's flood did not occur. If you feel that not knowing how 2370 turned into Egypt is verifiable proof, you need to show that too. You have only shown that the building of the pyramids need an explanation but that does not disprove the flood or dependent on that explanation.