You have implied that women's emotions are a negative thing while saying that men's emotions are acceptable. I am not sure where you are but in my experience, men are as likely to have emotional outbursts as women.
For an example, I know of far more men who seek anger managment help than women. Based on this, I could ask, which would you prefer...a man who might loose his temper and become destructive making governmental decisions or a woman who might cry with compassion or when hurt?
I would hope that anyone, be it man or woman who is in charge of a nation's fate would be a self disciplined individual.