you're making it moral when it's about legality. attourney client privilege exists for a reason. a client can and often does admit to their lawyers what they did, but it is the lawyer's job to get them off or counsel them to their best advantage. like pleading guilty if there is no way they can get them off to get a lesser charge. if there is reasonable doubt, which is what the lawyer has to prove, then they are legally required to prove it. that's why they're a defender and not a prosecutor.