In another thread it was asked what women get out of a women's megillah reading.
First, in terms of the women who actually lein. I daven in a youth minyan on shabbat where the boys lein. The boys volunteer to lein and presumably they get something out of it. I assume that the women who want to lein megillah have the same motivations as men who volunteer to lein torah.
As for the participants, it's empowering to see that women can indeed have a voice, both literally and figuratively, that their avodah in the synagogue doesn't consist of simply being observers of the men on the other side of the mechitzah. It's also an issue of role models - it's inspiring for women, young ladies, and girls to see women leining and it gives them something to strive for. If men had to come to shul and could never fully participate and were just observers of the women leading services, I would venture to guess that many men would quickly lose interest in continued participation in shul-based services.
I once had a conversation with an Outreaching rabbi. It was while I was saying kaddish and I was telling him how meaningful the kaddish year is for men and it's too bad the women have almost nothing during their year of aveilut. For men, there is a true sense of commoraderie when you come to shul every day, and the same men are there, and they wish you that the neshamah should have an aliyah when you daven from the amud, and it's a real opportunity for men to participate in shul and really feel part of a community, and when you're travelling to do the mesirut nefesh to make sure you'll have a minyan, or to leave work early...it's hard to explain, but the year of saying kaddish is incredibly inspiring and moving. But the women don't have this at all. At most, they don't listen to music, or they get their friends or daughters to wear their new outfits first, or they help serve something at a simchah to get around the problems of aveilut. But they totally don't have that entire shul thing. So the Outreaching rabbi told me, well, they can bake challah le-ilui nishmat the departed. Big deal. It's so totally not the same thing. Actually participating in synagogue services and rituals and so totally different than being an observer. Saying kaddish is so totally different than baking challah. I can really understand how it's meaningful for women to actually lein megillah, or to see other women leining it. It's really empowering, and inspirational. It allows them to take ownership of the ritual rather than being appendages. Now this might not be for everybody, but for many, it's very important. Probably for many of the same reasons that women come to shul to daven even when they have no obligation to daven in a minyan. They do it for a variety of reasons, and for many of the same reasons, women want to not only daven in shul, but participate more fully.
There. That's a start.

Now what?
] I don't buy the bolded line. I think a parent can say such a thing, but I have a hard time believing it from a rebbi.