Humans hide but gods fly

This lecture by Professor Jan Assmann left me with more questions than answers regarding the purpose of the pyramids in Egypt and their connection to the quest for immortality by the Egyptians or at least the quest for immortality of the Egyptian pharaohs.
But I don’t know.
What do you think?
Maybe some of you have some opinions about this?
I thought maybe this is some small contribution to clarifying the purpose of the pyramids in Egypt, that’s why I’m posting it.