the reason to object the immaculate conception is because mary herself doesnt think herself ‘sinless’.
immaculate conception is what the rcc thinks about mary - sinless (untainted with sin). but that’s just the rcc church.
so what the rcc put forth became a paradox ‘the sinless mary who needed a savior’ unless of course if the mary of the rcc is not the jewish mary of scriptures.
Luke 1
44 For behold, when the voice of your greeting came to my ears, the babe in my womb leaped for joy. 45 And blessed is she who believed that there would be a fulfilment of what was spoken to her from the Lord.” 46 And Mary said, “My soul magnifies the Lord, 47 and my spirit rejoices in God my Savior, 48 for he has regarded the low estate of his handmaiden. For behold, henceforth all generations will call me blessed; 49 for he who is mighty has done great things for me,…
Luke 2
22 And when the time came for their purification according to the law of Moses Lev 12 ], they brought him up to Jerusalem to present him to the Lord 23 (as it is written in the law of the Lord, “Every male that opens the womb shall be called holy to the Lord”) 24 and to offer a sacrifice according to what is said in the law of the Lord, “a pair of turtledoves, or two young pigeons.”
Leviticus 12
6 “And when the days of her purifying are completed, whether for a son or for a daughter, she shall bring to the priest at the door of the tent of meeting a lamb a year old for a burnt offering, and a young pigeon or a turtledove for a sin offering, 7 and he shall offer it before the Lord, and make atonement for her; then she shall be clean from the flow of her blood. This is the law for her who bears a child, either male or female. 8 And if she cannot afford a lamb, then she shall take two turtledoves or two young pigeons, one for a burnt offering and the other for a sin offering; and the priest shall make atonement for her, and she shall be clean.”
only Jesus was sinless and had no want for a Savior, nor called God his Father a Savior.