Why are optimistic asymmetry and pessimistic asymmetry presented as the only two choices? Why not a third, symmetric choice where everything is viewed as specif

Why are optimistic asymmetry and pessimistic asymmetry presented as the only two choices? Why not a third, symmetric choice where everything is viewed as specific, impersonal, and impermanent? I think this world view is the closest to reality, and I also think seeing the world this way promotes good mental health. I don't have any research to back this up, though. Do you happen to know anything about this?