I think its important to remember that neither of those doctrines were dogmatic in the Roman Catholic Church at that time either. Luther did address the fact that in many ways the devotion to Mary was higher than that of Christ in the Roman Catholic Church.
There were serious problems with Marian theology in the 16th Century, and these problems helped fuel the Reformation. You’re right- it’s important to realize the lack of doctrinal standards of Marian piety in the Sixteenth Century. One cannot appeal to the latest version of the Catholic Catechism as the doctrinal standard for Marian piety four hundred years ago.
Max Thurian notes , “At the Reformation anything to do with Marian doctrine was considered as being part of free theological opinion, so that Orthodox Christology should not be comprised by this or that opinion” [Max Thurian, Mary Mother of the Lord Figure of the Church (London: the Faith Press, 1963), 23].
David Wright focuses the situation:
“At the outset of the Reformation era, formally approved Church teaching about Mary encompassed only the virgin birth, her role as ‘God-bearer’ (theotokos) in the incarnation, and her perpetual virginity—and all of these were the legacy of the age of the Fathers. But since these early definitions theological speculation had steadily mounted. If there had so far been no further dogmatic deliverances, this was partly because on one or two issues different segments of the medieval Church were at loggerheads”[David Wright, Chosen By God: Mary in Evangelical Perspective,161-162].
Hhistorian Hilda Graef points out, “…the Mariology of pre-Reformation times had really in many cases become Mariolatry, and needed to be pruned from excesses which could only lead to a debased form of Christianity among the people who were encouraged to place the blessed Virgin beside or even above God” [Hilda Graef, Mary: A History of Doctrine and Devotion Vol. I (New York: Sheed and Ward) 318].
Perhaps this description from the Lutherans and Catholics in Dialogue is adequate:
“Late medieval piety was marked by a great emphasis on the intercession of deceased saints and in particular by an intensification of confidence in the power of Mary. The steadily increasing number of saints invoked to remedy human needs and ills, and the long-accustomed role of Mary as mediator between the faithful and Christ, obscured the traditional theological distinction between adoration (latria) and veneration (dulia). In 1517, when Martin Luther called for an academic disputation on the use of indulgences and their relationship to the sacrament of penance, the cult of the saints and Mary became a related issue.”[Lutherans and Catholics in Dialogue VII, 23]. (I would question on what basis one evaluates dulia and latria in the sixteenth century).
James