I posited the hypothetical (which actually is the reality, accept it or not) because,in the effort make your points, you and others seem dismissive of Mary, the actual mother of our Lord. Regardless of your thoughts on her Immaculare Conception, I hope you can aknowledge that Mary had a unique role in the history of salvation. Indeed, she is the first Christian, and the person closest to Christ. She bore Him, gave birth to Him, raised Him and stood beneath His cross.
Nobody ever denied that Mary played a unique role in history of salvation.
Only one woman could ever bear the Messiah.
HOWEVER, that does in no way justify all the extraneous teachings and doctrines and characteristics that have been attributed to her over the centuries.
It's always best to stick with what's found in Scripture and not go beyond that into speculation and rationalization. That will surely lead into error, as it has in all the stuff added to Mary that has NO basis more than wishful thinking.