There are a significant number of questions that exist around the systems we are deploying in the world. Many of them are urgent, and not all of them are being addressed all that well. Barring the obvious racism, sexism and other bias in the tools we are creating, complexity and understanding are, to be honest, amongst the most urgent.
If we are using systems that act in our name, the systems that we use have to be able to explain or justify in some reasonable way. The more complex, the more imperative this is.