Well, we tried that once.

"I will feel equality has arrived when we can elect to office women who are as incompetent as some of the men who are already there."- Maureen Reagan
It does seem to be true that for a woman to be offered a place of ministry leadership she is held to the highest standard. She must be exceptional. She must be a proven commodity. However, if a woman does not "succeed" in ministry, it is often said, "well, we tried that once." If that was said every time a man did not succeed, there would be no pastors...anywhere.