Because here's the thing about revenge movies that revolve around a woman "getting even." No one listens to the women in these movies until make themselves heard, either through violence or elaborate schemes. The women protagonists are uniformly underestimated. After all, who would think that a 14-year-old girl could be capable of being a cold, avenging angel, or that an eight-month pregnant woman could also be a serial killer , pursuing anyone who offended her?