Ah, but it doesn't say that at all. From Ineffabilis Deus
We declare, pronounce, and define that the doctrine which holds that the most Blessed Virgin Mary, in the first instance of her conception, by a singular grace and privilege granted by Almighty God, in view of the merits of Jesus Christ, the Savior of the human race, was preserved free from all stain of original sin, is a doctrine revealed by God and therefore to be believed firmly and constantly by all the faithful.
“... in view of the merits of Jesus Christ,...”
Created grace, P? Sure looks like it and we all know what the East thinks of that medieval notion. But beyond that, doesn’t such a notion negate her free will acceptance of the angel’s announcement? Isn’t this Panagia a sinless automoton and thus not in the least worthy of emulation? Isn’t she ontologically different from all the rest of us? Why is this creature human, Pyro? Isn’t the Panagia of the Eastern Church fully human, in every sense conceived and “ensouled” just like you and me, thus transmitting humanity to her Son and in her manifest sinlessness, testified to by the consensus patrum (if not by all the Fathers)worthy of emulation and veneration because it was through her perfect response to God’s grace that she never sinned?