Look at the long wake of professionals and businesses left by Trump alone, who could out litigate most to get a cheap (or outright unpaid) bill. There are countless reasons to shift trust to a programmatic contract. Plus there are projects like Agrello which seek to implement the smart contract in a way that is also legally binding. Programmable money is here to stay, and there is a sea of social, economic, and technical benefit to be had from it.