GOD was very meticulous as to how the Hebrews were to construct the 'Ark of the Covenant' in Exodus 25. The Ark was very sacred because it contained GOD'S 'Word', written on the stone tablets handed down by Him to Moses. GOD and sin are mutually exclusive. That 'vessel', Mary, had to be worthy of the 'Treasure' she carried, Jesus The Christ, the Word Incarnate. If you say 'yes' to that one, then please explain your answer to me.
Protestants have a problem with the Immaculate Conception of Mary.
It is a major 'stumbling block' for them. They miss several very important points. They try to bring GOD down to our human level in order to explain His ways. This is as bad as to try to raise our human ways up to GOD's divine level. It simply cannot be done.