Our Blessing and Our Curse is Self-Awareness

All of the gratuitous detail in the world, gratuitous insofar as it is outside the apprehension of women/of men.

For instance, a monumental canyon in a crater on the far side of the moon, never seen by the human eye before Apollo.

Or the symmetry in the pattern of cells in the gut of a sea creature that only lives in depths of 5000 feet or more.

Why does this gratuitous detail strike me as sinister, as nightmarish?