Why is a secular spiritually crafted book like "Thus Spake Zarathustra" mostly accepted by academic but a work like Jung's "The Red Book" somewhat mocked and relegated to mumbo-jumbo?

by Domhnal

To be fair, I've not read either work in their entirety, but both seem to have the vibe of trying to impart wisdom through religious-like language, but both were written by non-religious individuals in the conventional sense.