Proof. It's always about the proof. We couldn't even canonize John XXIII and John Paul II without a little supernatural evidence. Do we really think God is that stingy with salvation? Yes, we can blame it all on ecclesial bureaucracy, but those rules don't just emerge out of nowhere. We've always been more comfortable retaining sins than forgiving them. Perhaps that is the real original sin Jesus tried to wash away: our stubborn unwillingness to take divine mercy for granted.