Like 'jerf says, we have many centuries of experience in dealing with people and people-based systems. We know the biases, the cognitive problems, the buttons to press and the buttons to absolutely avoid pressing.

More importantly, humans share the same brain architecture and work roughly the same way - you and me included. This makes it easier for us to understand other people (also having a part of the brain trying to directly model other people's minds helps). The way those NN-based black boxes work is completely alien to us (and each being a special snowflake made of hacks does not help).