That is a convenient argument to deny the need for Mary's sinlessness, but that makes no sense. I have seen it argued before, however, I have never seen solid evidence to support such a notion.
Your claim needs to be backed up with solid evidence. I see no possibility for that to occur.
The reason it cannot work is because you are saying that the father passes on the wounded human nature.
Now, follow with me the implications of such a claim
- The father passes on the wounded human nature
- That means it is the father who passes on the human nature, which for all humans after the fall, happens to be wounded
- Jesus did not have a human father.
- That means Jesus had no one to pass on a wounded human nature
- That means Jesus had no one to pass on a human nature, even a wounded one
- That means Jesus did not have a human nature!
To deny Jesus had a human nature is one of the many CHRISTOLOGICAL HERESIES that the Early Church had to deal with.
Jesus had 2 natures, a DIVINE nature and a HUMAN nature.
In order to have a human nature, He had to have taken it from His mother Mary.
This totally invalidates your claim, for according to your claim, a human father is necessary to pass on a human nature. . . but Jesus did not have a human father.
Obviously, His human nature was passed on from Mary.
If she had a flawed, wounded human nature, then that is what she would have had to pass on, then Jesus would have had a woulnded human nature and would have been in need of saving Himself
But He did not inherit a wounded human nature, but a perfect and sound and whole human nature, free of the stain of Adam's sin.
He got that unwounded human nature from Mary, who had to possess it herself in order to be able to pass it on.
She possessed hers because God healed her, saved her at the momment of conception - ie God INTERVENED. Jesus possessed His human nature from conception because He received it NATURALLY from Mary - God did NOT intervene regarding His human nature at the momment of conception.
So where Mary needed internvention, ie a SAVIOR at the momment of her conception, Jesus did not.
Peace