That is an interesting point. In my opinion AIs _could_ have "emotions" put in them too. Emotions are nothing more than a mechanism baked in the neural network to work toward goals. AlphaGo for example, could be seen as having a single very basic emotion: Work toward winning the match. We may not clearly understand how to put emotions in the AIs that we will build. But we have some working example: The emotions in our brains. Or in some animals like dogs, or dolphins. These are mechanism to guide individuals toward goals: to survive, to mate, accumulate resources, etc. And are pretty effective. If we successfully reach to understand how these mechanisms work, then we will be able to bake emotions in the AIs that we will build. That we will use to push these AIs toward specific goals. If we succeed, then we could actually have "friendly" AIs. If we don't do this, then we will have "cold" AIs. Without emotions, that we will have to try to keep under control in other ways.