Mary IS the NT the Ark of the Covenant.>
Mary was beautifully prefigured by the Ark of the Covenant.
The Ark carried sacred objects --- flakes of manna and the tablets of the Law --- associated with God's saving work toward the Hebrew people. And Mary carried not manna, but the Living Bread; not the Law, but the Lawgiver; she carried not just the saving of the Hebrew people, but the Savior of the World.
You would be more accurate if you said Roman Catholic eisegesis.....not Biblical exegesis.