How does the title of Mary as Co-Redemptrix exemplify or encourage simplicity towards Christ?

How does the petitioning for a new Dogmatic definition, which necessarily includes the naming of Mary as "co-redemptix", to the highest levels of Roman Catholic authority, "grass-roots" style from the laity, exemplify and encourage simplicity and purity of commitment towards Christ (sole-mediator between God and man), especially when the current Pope appears to reject the notion, calling her a disciple?

The petition for the Fifth Marian Dogma are three titles, the Mediatrix and Advocate are already in the Catechism, only the title Co-Redemptrix needs further acceptable definition.

969 "This motherhood of Mary in the order of grace continues uninterruptedly from the consent which she loyally gave at the Annunciation and which she sustained without wavering beneath the cross, until the eternal fulfillment of all the elect. Taken up to heaven she did not lay aside this saving office but by her manifold intercession continues to bring us the gifts of eternal salvation . . . . Therefore the Blessed Virgin is invoked in the Church under the titles of Advocate, Helper, Benefactress, and Mediatrix."(Lumen Gentium 62)

The title Advocate and Mediatrix already part of the Lumen Gentium teachings, a Dogmatic Constitution of the Church.If the petitioner only seek the two titles, then we can see that there will no longer obstacle in proclaiming this as Fifth Marian Dogma.

The title that lacks Dogmatic definition is the Co-Redemptrix, but the succeeding Catechism defined it already as "sharing in the Priesthood of Christ"..

970 "Mary's function as mother of men in no way obscures or diminishes this unique mediation of Christ, but rather shows its power. But the Blessed Virgin's salutary influence on men . . . flows forth from the superabundance of the merits of Christ, rests on his mediation, depends entirely on it, and draws all its power from it."513 "No creature could ever be counted along with the Incarnate Word and Redeemer; but just as the priesthood of Christ is shared in various ways both by his ministers and the faithful, and as the one goodness of God is radiated in different ways among his creatures, so also the unique mediation of the Redeemer does not exclude but rather gives rise to a manifold cooperation which is but a sharing in this one source."514

We can see in CCC970. the Catechism already is defining the role of the ministers the Sacramental Priesthood and the faithful or the Baptismal Priesthood taken from 1Peter2:9.

Not only the Sacramental Priest can offer a pleasing sacrifice to God, but all the faithful can share in the Priesthood of Christ by virtue of the Sacraments of Baptism, all baptized are Royal Priesthood. And St.Paul teaches in Collosians, that all can offer or share in the sufferings of Christ, in a way, all of the baptized are co-redeemer.

Now I rejoice in my sufferings for your sake, and in my flesh I am filling up what is lacking in the afflictions of Christ on behalf of his body, which is the church. (Collosians1:24)

If all the baptized, are called to be sharer or co-redeemer, a royal priesthood as part of the Mystical Body of Christ the Church, what more is the Mary the Mother of the Church?

That's why we can see Pope Pius XII words is the key to understanding Mary as the Co-Redemptrix, because She is not only the Mother of the Church, She is also as a perfect disciple of Christ can offer Her sufferings, Her sorrows as a pleasing sacrifice to God.

Mary offered Him on Golgotha to the Eternal Father, together with the holocaust of her maternal rights and her motherly love, like a New Eve for all children of Adam.(Pope Pius XII)

While the baptismal priesthood allowed us to offer our own sufferings united to Christ, At Calvary which is a Mass according to Pope Francis. https://opusdei.org/en-ph/article/the-mass-means-repeating-calvary/

Mary offered Jesus Himself to the Eternal Father at the Foot of the Cross. This is the highest form of sacrifice and Mary is the one who had offered it to the Eternal Father at the very hour that Jesus is Agonizing at the Cross.

The Divine Mercy prayer perhaps came from the very lips of the Blessed Virgin Mary at the Foot of the Cross;

Eternal Father I offer thee the body,blood,soul & divinity of your beloved Son our Lord Jesus Christ in atonement for our sins and those of the whole world."

How about the words of Pope Francis? It seems he is not favoring the petition on Mary's additional title. Let us remember, the title Advocate and Mediatrix already have a Dogmatic definition, the objection that Pope Francis is referring to most probably the Co-Redemptrix, which I doubt, Pope Francis mean it that way. I think it is safe to say, that Pope Francis is not seeing the Holy Spirit moving in that direction yet and the Movement needs to pray for, as Pope Francis is docile to the voice of the Holy Spirit like what the Woman Movement asking Pope Francis to look into Woman Diaconate which Pope Francis easily gives positive support. The group that pushing the approval of the petition on the Fifth Marian Dogma needs more prayer and wait for God's perfect timing. And I'm sure, this Co-Redemptrix title is moving now even at the US Congress, uttering the words, "Amen and a-Woman", accidentally or mystically?

"Mary Virgin Priest, pray for us."(St.Pius X, 1905)