Nowhere in Scripture is Mary referred to as anything other than a devoted mother of the man, Jesus Christ.
Christ even corrects those who sought to assign her some unique position...
But he said, Yea rather, blessed are they that hear the word of God, and keep it." -- Luke 11:27-28"And it came to pass, as he spake these things, a certain woman of the company lifted up her voice, and said unto him, Blessed is the womb that bare thee, and the paps which thou hast sucked.
You wrote:
“Protestants believe to assign a sinless nature to anyone other than Jesus Christ is a grave error.”
And Protestants in a similar fashion simply believe whatever they choose.
“Nowhere in Scripture is Mary referred to as anything other than a devoted mother of the man, Jesus Christ.”
Nowhere in Scripture does it say that something must be explicitly in scripture to be true.
“Christ even corrects those who sought to assign her some unique position...”
Nonsense. All Jesus was saying was that it was more important to be part of Jesus’ spiritual family than his earthly family. Mary was a member of both families. She is Christ’s mother, and she is the best example of someone who hears and keeps the word of the Lord (Luke 1:38, 45).