Yes, that seems to be the point here. In addition, there are many more, similar quotes from other popes and saints, a few of which I have posted below.
True Devotion To Mary by St. Louis Marie De Montfort is considered to be
the classic work on Mary. If this book had been filled with doctrinal error, De Montfort would not have been canonized. So, the question goes back to the original quotations. These popes and saints were either correct or incorrect. They were either orthodox in their statements or they were heterodox in their statements. And we must be willing to admit that if they were heterodox in their statements, then they were blaspheming as well.
Here is some interesting reading on
True Devotion To Mary
with some reflections on the same book by the late Pope John Paul II.
michaeljournal.org/montfort.htm
“With reason did the Most Holy Virgin predict that all generations would call her blessed, for all the Elect obtain eternal salvation through the means of Mary”
ST IDELPHONSUS
“Every one of the multitudes, therefore, whom the evil of calamitous circumstances has stolen away from Catholic unity, must be born again to Christ by that same Mother whom God has endowed with a never-failing fertility to bring forth a holy people.”
POPE LEO XIII
“Bearing in her womb the Savior, Mary can also be said to have borne all those whose life the Savior’s life enshrined. All of us, then, as many as are knit to Christ, have come forth from Mary’s womb: one Body, as it were, knit together with its Head.”
POPE ST PIUS X
“Souls protected by Mary, and on whom she casts her eyes, are necessarily justified and saved. Just as it is impossible that they be saved from whom Mary turns away her eyes of mercy, so it is certain that they who are loved by Mary, and for whom she intercedes, will obtain justification and eternal life.”
ST ANTONINUS
“We believe that Mary opens the abyss of God’s mercy to whomsoever she wills, when she wills, and as she wills; so that there is no sinner, however great, who is lost if Mary protects him.”
ST BONAVENTURE
“Not a single soul who has really persevered in her service has ever been damned.”
ST LOUIS MARIE DE MONTFORT
“O Mother of God! If I place my confidence in thee, I shall be saved; if I am under thy protection, I have nothing to fear; for being thy client is a certainty of salvation which God grants
only to those whom He intends to save.”
ST JOHN DAMASCENE
“He who neglects the service of the Blessed Virgin will die in his sins. He who does not invoke thee, O Lady, will never get to Heaven. Not only will those from whom Mary turns her countenance not be saved, but there will be no hope of their salvation. No one can be saved without the protection of the Blessed Virgin Mary.”
ST BONAVENTURE
“To desire grace without recourse to the Virgin Mother is to desire to fly without wings.”
POPE PIUS XII
“Jesus honored her before all ages, and will honor her for all ages. No one comes to Him, nor even near Him, no one is saved or sanctified, if he too will not honor her. This is the lot of angels and of men.”
ST MAXIMILIAN MARY KOLBE
I will put in with the saints and popes.