Luther was a Catholic. None of Luther’s personal opinions about Mary passed scriptural muster and as a result, none appear in any of the confessional documents of Lutheranism. Because Confessional Lutherans worship and serve God, not a man, not even one so mightily used by God as Luther.
As were all "Protestants" before the Reformation. At the founding of Protestantism, all of the Marian devotion that this thread rejects, were fully embraced by your Founders.