One could, alternately, wonder what is going on with the abuser that they chose this option among all the possibilities for reaction.
I often think they do not see themselves or the world clearly, but are trapped in lies, and often the abused is in the same state ... in reverse. Acting out abuse will create feedback eventually, and it ought to receive more of a reaction than it does....
I feel it would be better if our culture taught each other to recognize how important it is to expose abusers to the light while keeping ourselves aware of the importance of demonstrating a different way, and refusing to fall into their lies. Too many say "oh, well, that is how things are in this culture," and even karma gets sucked into the situation as an excuse ... There are so many ways to enable blindness.
It is more common to think one can extract the victim from the situation, and that this will be a rescue or change of karma for them. But is it is also vital to expose the lies the victim believes and assist them in learning to protect themselves, or they will attract future abuse by their vulnerability to abusive manipulation.
The effect of such choices can bring self-awareness and growth for either the abuser or the abused ... or it can create a cycle of blame, irresponsibility, and further lies.
The cycle can continue down for one and up for the other or they can both go the same direction either way,... and it has everything to do with whether the individual recognizes the difference between the internal and external self, and that they are always responsible for how the internal self responds to anything, no matter the external condition.
Karma may simply be "opportunity for awareness" or a state of contrast, so to speak. Those who are capable of seeing and learning from the contrast between their own condition and that of another may not need to actually experience the alternate for themselves in order to learn the difference.