I think the point of studies like this is to show that violence against women is overwhelmingly perpetrated by people they know. People love to characterize the epidemic of physical and sexual violence against women as though it’s because of random horrible men targeting women in dark alleys. This directly shows that this is not the case. It’s overwhelmingly men that women know directly. The vast majority is committed by intimate partners and close male family members in women’s homes.
Women who speak out against this violence are very frequently met with shame and further violence. Even in cases where the man is obviously in the wrong. I would know as I and several of my friends have had this experience ourselves. Society is only sympathic to women who have experienced violence in mass media. When it comes to women in their hometowns, in their local communities, they often face outright hostility. The problem of misogyny is far more widespread than people are willing to acknowledge.
This is ignoring the fact that not every women who is a victim of intimate partners violence is murdered by that intimate partner. Those who die are a very small minority of those who suffer. Women absolutely have to be concerned about being physically or sexually harmed by intimate partners. It is so common that we have to for our own survival.