"Nowhere in scripture is it said that we need a 'mother' of any sort".
It's quite apparent that Jesus Christ Himself chose to come to us in his body through a mother.
If "we are the body of Christ, member for member" (St. Paul), then we are incorporated in Him through a mother.
It is the way He has chosen to "become flesh and dwell among us."
Jesus did nothing out of the ordinary in coming to us through a mother. He is a God of order and He chose to follow the order He set "in the beginning". It is perfectly natural and amazingly awseome at the same time that he was born of a woman. In fact, He clearly CHOSE to be identified with us (scriptural) in that we all come into this world through a mother. Being birthed from a woman's womb is the natural means for a person to come into this world. Could He have identified Himself with us has He come in some grandiose fashion other than being born of a woman?
That He chose to be birthed of a woman, according the laws of nature that He preordained, says nothing to indicate we must have the church as a "mother".
We are the body made up of many members with Him as the head, yes. That we are such is in no way indicative of our need for a "mother church". It is Paul's analogy of the church as a body and Christ as the head that gives us insight as to our oneness with Christ and each other.
Nowhere is it in scripture that the church is to be our "mother". God is mentioned numerous times as being our Father, but nowhere does He indicate we have need of more than Himself.