I need to leave this long one for later . . . maybe in a day or so . . .
However, you said:
She is dispenser of all graces because in giving birth she, so to speak, ‘dispensed’ Jesus, who is the sum of all Graces. This title is just a meditation on her being the mother of Jesus.
NOT so fast, Bro.
That is NOT the sense of the wording in Ferraro.
That is NOT the sense one gets from listening to Roman Catholics et al hereon and in our daily lives.
that is NOT the sense that one gets from a LOT of Roman Catholic et al writing.
If English words mean anything dependable at all, they do NOT mean what your assertion insists they mean.
It is CLEAR from a HOST of diverse sources that MANY Roman Catholics et al
construe it that MARY HERSELF IS ACTIVELY NOW, FROM HER HEAVENLY THRONE—CONSTRUED TO BE AT CHRIST’S RIGHT HAND—DISPENSING GRACES TO ALL MANKIND AS A FLOWER GIRL DISPENSES POSIES AT A WEDDING.
And I think you don't get it. And you don't get it because, so to speak, you guys are at the beginning of it.
You have to imagine this: I think, "Whoa! Mary is, in a way, the dispenser of Grace!" Then I think about the unique and amazing place she has in the hielsgeschichte.
As I have written elsewhere: Mary REALLY DID give herself to God (by the operation of His prevenient grace.) And having submitted her will to His, she became a bearer of His Love. She brought Love into the world -- LITERALLY.
But maybe the use of literal and figurative is too cut-and-dried. If I offer myself to God (asking Him for the grace to mean it) will I not be a conduit of God's Love? And while some may dicker and tweak, the truth is the God is Love, and Jesus is God "with skin on," God made visible and palpable. If I am a conduit for any love it is Jesus who has made me a conduit for himself.
So I can (and do) call upon Him AND say "let my soul like Mary//Be thine earthly sanctuary." [That's a Protestant hymn.]
From MY POV, it's not an "interpretation" that Mary was like the Ark of the Covenant; it's just, well clear. The Ark had the written Word of God within it. Mary had the Sho' 'Nuff Word of God within her.
Mary simply WAS the guardian and the 'dispenser' (if you can think of parturition as being like one of those Pez things...) of Jesus.
So, we would say, just sit with that. Think about it. "Dig" it. Here was a woman who had within her womb Him through whom the worlds were made.
Now when a non-catholic comes to the exultant and amazed praise which arise from just "sitting with" the idea that Mary did what she did, but also suffered what she suffered ... and as the parent of a child whom the docs said would die, I guess I should say that anybody who doesn't think that's WORSE than having a sword pierce your heart is asleep or dead or, if I have my way, about to become dead, if you get my meaning.
(Don't worry, I'll let you all off ... this time.)
And then add a soupcon of Col 1:24. And consider that God is calling us sons and heirs.
Well after a while, Mary starts looking pretty good.
I am entirely serious that Protestants, especially those brought up in an anti-Catholic environment, will find this all a bit of a reach.
But they are looking at the whole thing eager to construe it the worst possible way. And since the average Catholic is NOT a thoughtful and articulate theologian, the average Catholic is going to give an inadequate account of Marian devotion.
But that proves nothing and means little. On both sides my family is parsons and lawyers. We're all about theology and careful expression and awareness of fine distinctions. I am, you might say, predestined to give an articulate account of Marian Devotion. But somebody whom God has graced with love and virtue but not verbal finesse will probably be a better servant of God Most High, while saying things that would curl the hair of the average Protestant (and of a great many Catholics.)