Sorry as usual you are dead wrong on damn near everything you posted here.
Because it happened before the days of the local broadcast news and the New York Times. Something caused Egypt to fall from a Super Power status and that something was the Exodus.
Egypt was a society heavily dependant on slave labor. Slavery was the engine for their economy. No one can tell me that the great pyramids were built by paid Egyptian skilled labor. It was done on the backs of slaves.
You can deny that fact but it took a hell of a lot of labor. There’s no way Egypt could have afforded to pay salaries to skilled workers. It was done by slaves, and those slaves left Egypt.