Code is contract and disputes are handled by the courts. There's no such thing as a purely extrajudicial contract, is there?
I think the name smart contract is misleading because if you believe that the code is law then there is no actual contract in the smart contract. There is no meeting of the minds, no agreement on what the contract means or what is considered customary. Just a machine floating in the ETHer you can interact with. You owe the machine nothing and it owes you nothing.