Nope, not directed at you, more of a general comment. I do think that empathy and theory of mind go hand in hand. Both are present in any healthy older child or adult, both develop at about the same time and there is a wide variety of intenity among the healthy population (meaning there are perfectly healthy people with little empathy and theory of mind and people who score highly on both but most will be somewhere in between.
I think this is were the social character theories of people like Erich Fromm come into their own, or sociological theorising with respect of personality traitology, I definitely think that currently there is a validation and valuation of low or no empathy traits and/or character.
For instance I can say that last time I was at the book shop, just last week, I saw a total of four or five pop psychology books which dealt with sociopathy or psychopathy, one was a tell all story by a successful female CEO, one was a semi-autobiographical book seeking to instruct individuals who conform to a sociopathic or psychopathic personality profile, two others were from clinical practitioners who had a lot of dealings with psychopaths. I didnt see any books which dealt with "normal" personality or empathy and not in the conscious or unconsciously "promotional" way the other books did.
Although why society needs this social character I'm not sure, Fromm suggests social character is largely unconscious but constructed by virtue of the fact that society needs people to want to do what they effectively have to do anyway because force alone is insufficient to achieve the desired results. He suggested that the main personality types were hoarding/receptive, exploitative, marketing. Maybe the zero degrees of empathy deal is a subsection of one of those or a new innovation.