Priesthood isn't just about "presiding" at worship.  That is a Protestant notion of ministry.  

The form Sacramental celebrations have taken have indeed changed over the centuries, sometimes because of cultural considerations.  The essence of the Sacraments have not changed.  The Eucharist was always the Eucharist  regardless of the form the celebration took.  

You said that the Bible was written by "men."  My point about the Bible being Theopneustos was that God is the primary author.  Whether God worked through men or women to write the Bible does not impact the message or contents of the Bible because what was written is what God wanted written.

When you said the Bible was written by "men" I took you to mean that the Bible is not credible when it talks about the genders due to "patriarchal" influence.