Okay, so if I take for given that me being born under a constellation that looks like a crab has some immutable affect on my personality, what exactly is causing that?

Does the constellation represent a deity who is projecting psychic energy on me that molds me in a way representative to itself? Are the stars themselves having some kind of gravitational effect on my brain chemistry? Does the cosmos function in some strange way where people born under a certain alignment of the celestial bodies end up having a different psychology?

Sorry to be a nerd about this but I don't like the idea its just pure vibes, I'd like some understanding of the actual causation here.