Hormonal effects has a long history of being overstated and overused when looking for cause in human behavior. It has been used to argue that women aren't fit to vote, then later that they are not fit to hold professions where a stable emotional state is required, to later conclude that estrogen effect on emotional states is complex and what people at the time attributed to estrogen was primarily cultural expectations rather than actually brain chemistry (concluded with some really interesting studies). One conclusion that a profession said that always made good sense to me is that sex hormones are intended to regulate effective reproductive success, not to regulate emotions in women or violence in men.

For example, there was a study done on violent men in prisons and testosterone. The theory that was tested was if testosterone levels were indicator of more violence, for which the data revealed was not the case. Further studies showed that so long testosterone is within natural occurring levels, aggression was not effect by testosterone.