Jesus GIVES the grace.
Mary was graced, given grace.
Therefore she’s a sinner.
TRUE!Mary was graced, given grace.
TRUE!Therefore shes a sinner.
DOES NOT FOLLOW!
You seem to have ignored the evidence of Jesus, and of Adam and Eve before the fall:
You seem to me making "grace" synonymous with mere "forgiveness." This lacks precision. Scripture says (Romans 6:23): "The grace of God is life everlasting."
Luke 2:52 And Jesus was increasing in wisdom and in years, and in grace before God and men.