Abusers select their victim carefully.
They don’t marry or hire X and then begin their Abuse as if it is a side thought. They intend to abuse whomever is in the ‘position’, so need to be certain that they have it ‘right’.
For example, a man who punches a woman in the face must know she isn’t able to fight back. If she is, if she knows martial arts, he’ll be the one bleeding on the floor.
A Boss From Hell must insure that he doesn’t push a worker who will push him down a flight of steps, or get up and walk out at the first bark.
In short, Abusers, to be successful, must spend some time selecting their Victim so as to insure they have a proper Victim