This is a great question. One of the best ways to answer this question is to say that all people engage in interpretation. And since all people are different in terms of their experiences and worldviews, interpretations differ as well. To put it succinctly, people know thing in the mode of the knower.
When we couple this insight to the differences between men and women, we can say that men and women interpret texts differently. They see different things and hence intrepretations differ. Gender can make a profound difference in interpretation. In addition, it is important to note that so far most of the texts (at least) in history were composed by men. Hence, we need these texts to be challenged by women interpreters.
In conclusion, since men and women come with different experiences, expectations, and cultural conditioning, gender is an important consideration in the process of interpretation.