"Khemetian claims, like being the sons and daughters of God, might have been meant in a spiritual or astrological sense"

* I am speaking of course in this sense. I am speaking of for example MOSES being an astrological/mythological character(Massey associated him with Shu/Khepheus, with rod in hand leading the children of Ra(Israelites) from the lower to the upper heavens) which perhaps was associated with a specific Pharoah(as you have associated with Ahkenaton) where the stories and attributes of the astro/mythological character are affixed to an actual ruler. Very similar to how Haile Selassie and other Ethiopian monarchs took the titles "King of Kings, Lord of Lords, etc." - which in the most ancient sense most likely had an astro-mythological genesis.