Perhaps the ancient Tradition is not simply “one complete esoteric doctrine that was unfortunately broken.”
Maybe differentiation itself allowed different civilizations to develop different dimensions.
Egypt develops one set of sacred forms. Mesopotamia another. Persia another. India another. Greece another. Then later Israel develops something new.
Revelation enters multiplicity, differentiates, develops distinct forms, and is later regathered at a higher level.
Primordial Scattering - after Flood/Babel.
Regathering - The Royal Art attempts to gather the later Western inheritance into conscious synthesis.