Whether by divine providence or simple evolution, its undeniable that human pair bonding between men and women is essential for raising children, and is also the core social dynamic of EVERY human society irrespective of culture or religion. We are hard wired to understand this, and notice when its not present. Any mythic story in which the male is a protagonist has to have that romantic hook of a woman involved. We could write entire essays explaining WHY its needed, but to put it simply Rowling wrote a male protagonist hero, but fundamentally did not understand a key component about what makes male heroes compelling to other men. Its not enough that they defeat the big bad. There has to be a return home to the village and the wife. And it cannot be an afterthought.