This completely stupid. There were many very learned women during the Middle Ages. St. Catherine of Sienna and St. Teresa of Avila are Doctors of the Church. She wasn't afraid to make suggestions to the Pope. (Which he was impressed with)
I was a student in 1978 and remember the student newspaper editorializing that the cardinals should choose a woman pope, using the Pope Joan story as support.
And this past October, Pope Benedict named Hildegard of Bingen a Doctor of the Church as well...
There are several women from the early years of the Church, and into the Medieval era, who are considered "Doctors of the Church"