"Can you show us where female pastors are not effective, teaching contrary to scripture, or obviously not empowered by the Holy Spirit just because they are women?"
That is a question that  isolates competency from larger picture influence. The focus is too narrow. Until you understand Gen 3:16 & 1 Tim 2;12 you will stay in an academic mode  instead of in a societal, familial, sociology mode of thinking.
With what I have heard from SDA pastors over 50 years..I have no doubt that some women preachers could do lots better in the pulpit. The main handicap is that the women are products of SDA seminaries and thus contaminated with the Adventitis approach at preaching.