It's the point of machine learning that no human needs (or often even can) understand how the machine is doing something as long as the target metric is optimiz

It's the point of machine learning that no human needs (or often even can) understand how the machine is doing something as long as the target metric is optimized. We are building black boxes which translate input into desired output. And tomorrow we will have black boxes building other black boxes. The only way to ensure nobody is killed is to add "0 people killed" to the target function of the black box.