Mary was kept on in christianity in order to entice in the pagans who needed a goddess to worship. It's why there are Marian cathedrals all over France. The protestants completed the goddess erasing project of christianity when Mary was cast out of their worship.
"I like the emphasis on Mary as someone who CHOSE to accept the gift and pain of being the mother of Christ, which makes her powerful, rather than someone it was forced on."
Well if men can persuade people that the woman consented then there is no rape. Acquiescence "Thy will be done" isn't consent though and it certainly has nothing to do with power. It would be crazy to argue that anybody else apart from god had power in that scenario.
"Luke 1:26-38
New International Version (NIV)
The Birth of Jesus Foretold
26 In the sixth month of Elizabeth?s pregnancy, God sent the angel Gabriel to Nazareth, a town in Galilee, 27 to a virgin pledged to be married to a man named Joseph, a descendant of David. The virgin?s name was Mary. 28 The angel went to her and said, ?Greetings, you who are highly favored! The Lord is with you.?
29 Mary was greatly troubled at his words and wondered what kind of greeting this might be. 30 But the angel said to her, ?Do not be afraid, Mary; you have found favor with God. 31 You will conceive and give birth to a son, and you are to call him Jesus. 32 He will be great and will be called the Son of the Most High. The Lord God will give him the throne of his father David, 33 and he will reign over Jacob?s descendants forever; his kingdom will never end.?
34 ?How will this be,? Mary asked the angel, ?since I am a virgin??
35 The angel answered, ?The Holy Spirit will come on you, and the power of the Most High will overshadow you. So the holy one to be born will be called[a] the Son of God. 36 Even Elizabeth your relative is going to have a child in her old age, and she who was said to be unable to conceive is in her sixth month. 37 For no word from God will ever fail.?
38 ?I am the Lord?s servant,? Mary answered. ?May your word to me be fulfilled.? Then the angel left her.