Four Millennia is a long long time. No wonder the exact accounts of the historic details have been lost to the ravages of time. But it is a blessing that we at least know and understand the significance of these landmarks.
Although modern archeological teams are equipped with some pretty cutting edge equipment but but the truth is that nothing inspires a historic revelation like a written account. That being said structures that still stand and the bricks that still linger are the best kind of remnants the history has to offer
You made a lot of good points, I fully agree.