Maybe YOU don't want a CEO to be reluctant about laying people off. I like working in places where my humanity has some value, even if it's not the most important thing. Maybe YOU don't want a surgeon who won't nick an artery if she thinks she can get away with it, because death has a strange appeal to her, but I like living.

It's a bit hyperbolic, but so's your statement. We don't need psychopaths, we need people who can keep their emotions in check. Training, exercise, mediation, and drugs are all useful tools for this.