"I was keen to read the "many compelling reasons" especially from the holder of the highest standard of proof on the planet.
Have I missed any?"
Although your scrutinizing is excellent, you missed an extremely important point.
As Professor Femano so hypocritically pontificates:
New insights continue to revise the old model thanks to higher standards of proof and the internet.
It all comes down to closing. And the foot.
What sort of closing did those Ancient Egyptians wear?
Answers the Professor:
I really don't care what they wore, what they ate, or what color their skin was. Good thing too, because if those pyramids really were constructed millennia earlier than orthodoxy would have us believe, there won't be much closing, foot, or skin left to study.
Good thing too, we've got bumbling Professor Femano RCT to offer further higher standards of proof on the absence of closing.
And the foot. (Was it a stinky foot?)