* You could point to the very high rate of Post-Traumatic Stress Disorder (or battle fatigue, or shell-shock) among male veterans to exemplify this.
Another reason that you haven't mentioned is that it is women who get pregnant. If 90% of the male population is wiped out, this is not as bad for the species as if 90% of the females are. This is the rationale for "Women and children first".
This is an excellent essay. One small criticism. In this type of essay, you should introduce your argument in the introductory paragraph. The reader should not have to wait until the end to learn what you believe about the topic. You could fix this easily by adding a short sentence such as "I believe that women should be given a chance at this role".