Like most of us, the Divergents exhibit attributes of more than one faction. We all have some degree of psychic and eagle eye perception and bleeding heart and pointy head judgment. Just as we all have two hands, most of us tend to favor one over the other, but we can use our less favored hand when needed. And some of us are more ambidextrous than others.
The story is about the possibility of love destiny—the notion that lovers are predetermined by destiny to be together. Of all the personality types, only the bleeding-hearted psychics are prone to believe in such things.