Marian devotion is idolatry. Mary was a sinner like the rest of us who found salvation in Christ Jesus (Luke 1:47). Mary is not the “Queen of Heaven”. Mary is not a “co-mediator” (1 Tim. 2:5; Heb. 9:15; 8:6; 12:24). Mary is not a “co-redeemer” (Eph. 1:7). Mary was not a perpetual virgin (Matt 1:25; 13:55-56; 12:46; Mark 3:31-34; Luke 8:19-21; John 2:12; Acts 1:14).
The first ever mention of Mary's supposed "perpetual virginity" was in the 4th century by Jerome. The idea of Mary being without sin can likewise be traced back to the 4th century. However, certain 4th century theologians like John Chrysostom, Basil, Cyril of Alexandria, and Hilary of Poitiers denied the sinlessness of Mary and believed she had imperfections. In the 3rd century, Origen and Tertullian also denied any such sinlessness. The first four centuries are completely silent about Mary's supposed "assumption" (and an assumption it is), but in the latter part of the fourth century Epiphanius of Salamis wrote this:
"The holy virgin may have died and been buried … or she may have been put to death—as the scripture says, “And a sword shall pierce through her soul” … or she may have remained alive, for God is not incapable of doing whatever he wills. No one knows her end."
In A.D. 431, when the Council of Ephesus was held, it caused an unhealthy interest in the mother of Jesus. From this point on, Catholics began to idolize Mary and create fantastical fairy tales surrounding her. In the 5th century, dozens of writings began to emerge that claimed Mary had never died. The worship of Mary had begun, giving her traits of Jesus and making her co-equal with Jesus. Augustine had given his blessing upon all these heretical teachings.
Catholics try to play fast and loose with the term "saved" with regard to Mary because quite obviously they do not understand salvation. They think that Mary was "saved" from being able to sin. Their arguments make for a great fairy tale, but there is zero truth behind it. Catholics argue that in order for Mary to give birth to the Saviour, she needed to be without sin. So if Mary had to be without sin in order to birth Jesus, then so too did her mother need to be without sin in order to birth Mary; and her mother had to be without sin in order to birth her; and so on and so forth all the way back to Eve. Catholics really need to learn how logic works instead of blindly believing complete and utter nonsense.
Catholics need to learn to read Scripture (and early Christian history) instead of blindly following false religious tradition that opposes it.