The Ark of the Covenant was covered in gold and elaborately sanctified in order to carry the presence of God.
How much more would She who literally carried the Incarnate Christ in her womb need to be sanctified, set apart, sacred and holy?
Not at all. She was an ordinary sinful human. That was the whole point. Christ humbled Himself to be born of a human so He could bear our sin. Mary was not special Christ IS.