Exactly. The machinery of justice is decorated with all kinds of indicators of objectivity and wisdom: precedent, settled law, sentencing guidelines, burdens of proof, law schools filled with eminent scholars.
And yet someone has a bad day, or a change of heart, or ate a tasty taco for lunch, or just fell in love, and lives are ruined or saved.
And yet someone has a bad day, or a change of heart, or ate a tasty taco for lunch, or just fell in love, and lives are ruined or saved.