I'm not sure what Shiranui's perspective is on that point, since he hasn't actually said, but here's my "Mormon perspective": In the LDS Church (and I guess in most Christian churches), there is a difference between policy and doctrine. Doctrines are "eternal truths," absolute truths that have existed since the beginning of creation and will continue to exist forever. They are "absolute" because they are determined by God himself. Some of these truths, He has revealed to mankind through prophets. In other words, the two important things that must be remembered about doctrine is that they (1) are determined by God, not by man, and (2) they are eternal. Policies are procedures put into place by human beings. The human beings who put these policies into place can be directed by God or they can simply make decisions on their own. In the LDS Church, a policy change can only take place if the fifteen men in the Church's leadership positions all agree on the proposed change. One hold-out and the change doesn't take effect.
Denying the LDS priesthood to women is actually a policy as opposed to a doctrine, because there is nothing in scripture which specifically states that the priesthood is only to be extended to men. On the other hand, it's not exactly a new policy. You look at Christ's twelve Apostles. They were all men. Yes, I know that certain women are believed to have been very important in His life, but there is nowhere in scripture where they were said to hold the priesthood. I know that somebody's going to say, "Yeah, but the culture of Jesus' day would not have permitted women to hold the priesthood. Things are different now." My reply to that would be, "Since when did Jesus ever let the culture of His day dictate anything to do with His gospel? He simply didn't. If He had wanted some of the Apostles to be women, He would have chosen some women. He wouldn't have caved in to societal pressure." The thing is, when a policy has been in effect for 2000 years, it's actually kind of difficult to distinguish it from doctrine. I think that's more or less the situation that exists today with respect to Mormonism.