I do not know how you can assume anything about Mary being sinless from the bible.
All are sinful:
Romans 3:21-23 NKJV
But now the righteousness of God apart from the law is revealed, being witnessed by the Law and the Prophets, even the righteousness of God, through faith in Jesus Christ, to all and on all[h] who believe. For there is no difference; for all have sinned and fall short of the glory of God,
Psalm 14:2-3
The LORD looks down from heaven upon the children of men,
To see if there are any who understand, who seek God.
They have all turned aside,
They have together become corrupt;
There is none who does good,
No, not one.
Romans 3:10-20 NKJV
“ There is none righteous, no, not one;
There is none who understands;
There is none who seeks after God.
They have all turned aside;
They have together become unprofitable;
There is none who does good, no, not one.”
“ Their throat is an open tomb;
With their tongues they have practiced deceit”;
Code:
“ The poison of asps is under their lips”;
“ Whose mouth is full of cursing and bitterness.”
“ Their feet are swift to shed blood;
Destruction and misery are in their ways;
And the way of peace they have not known.”
“ There is no fear of God before their eyes.”
Now we know that whatever the law says, it says to those who are under the law, that every mouth may be stopped, and all the world may become guilty before God. Therefore by the deeds of the law no flesh will be justified in His sight, for by the law is the knowledge of sin.
Jesus is the only one that is sinless.
2 Corinthians 5:21 NKJV
For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him.
The bible says that Jesus had no sin so he could become sin for us. Not that Mary had no sin so that she could birth Jesus. I really cannot understand why Mary’s rightousness is even in question? We are all justified by Christ’s death, not by our deeds. We cannot be justified by our deeds because our rightousness is like filthy rags to the Lord.
Isaiah 64:6 NKJV
But we are all like an unclean thing,
And all our righteousnesses are like filthy rags;
We all fade as a leaf,
And our iniquities, like the wind,
Have taken us away.
Explain to me two things. Why Mary’s rightousness even matters? And if it does, how does it stack up against the scripture I just laid out?