Did the Pharaohs come from Mesopotamia?

I wish I'd paid more attention to history when I was in school, instead of being so fascinated by the History Teacher's legs in net stockings. But that wouldn't help me with this problem, because the experts of those days have now been overruled by more modern interpretations of the evidence.

One prevailing theory says that the beginnings of Dynastic Egypt didn't happen until an elite group of Mesopotamians sailed their boats around the shores of Saudi Arabia and into the Red Sea, where they then dragged some of those boats across the sand into the Nile River. What's wrong with this idea?

For starters, the Eastern Desert, between the Nile and the Red Sea has a range of mountains along the edge of it, before you come to the sea. And has anyone lately tried dragging a wooden boat for over one hundred kilometers through bare rocks and sand, and then tried sailing anywhere in what was left of it? And these weren't small boats. Some held 50 to 75 men.

Egyptology fascinates me, but sometimes I get hung up on 'common sense'.

Now, let's look at this once-lovely statue. It got this way, incidentally, because succeeding rulers had a nasty habit of trashing the previous one's work, as a way of reinforcing their own power and authority. Stupid asses! But I'm digressing again. Looking at this work, it seems to suggest that this had been cast using some early form of concrete over an existing large rock for a base, rather than being laboriously carved and polished from one piece of stone, as we've always tended to believe. The ancients had mortar in antiquity, but did they also have concrete?  This is beautiful work, however it was made, and it's a shame it was smashed. But now I'm curious about how it was really made, aren't you? Did those ancients possess a level of technology unknown to us? And where did that come from? Are you wondering too?