Not necessarily. The New Testament is about Jesus, not Mary. She is mentioned , of course, as are many others, but she was not to be the focus of the Scriptures. Does that make any sense to you? The Scriptures are about God and how He has interacted with man up to a certain point. I don't think every detail is recorded, just what we need to know for our salvation.
I didn't imply that she needed to be the focus; however, even one mention on the very important subject of the sinlessness of the only person in history other than Christ would have to be necessary in order for me to believe it.
The only person in history to not need a Savior, and this is not mentioned by one Biblical writer?