At best true of Christ (and then not even), not true of the Holy Theotokos at all.
Exactly, and thus, the reason why Christ's human nature is perfect.
I never said he didn't take on the same flesh. I just said his human nature was not damages as ours was. If I draw a well drawn triangle and a poorly drawn triangle, both posses the same triangle nature. It's just that one instantiates it better than another.
So why did Christ need to give us sacraments at all? Why not just become incarnate and leave it at that?
The thing is, all three are connected. Taking on the same flesh we have and becoming incarnate and then giving us the Sacraments.
It's not damaged because he perfected it. I think the wrong understanding is that Christ needed a pure nature because he might become tainted. He is the source of all holiness, he can never be tainted. Darkness cannot overcome light. That is why the fallen humanity we have becomes perfected the instant Christ comes in contact with it as he took it on.
So, why exactly, then, do you need the IC? If you agree with us then what exactly does the addition of the IC give you? Even putting the best possible spin on it (and to be honest I find it hard to honestly do so), it just seems utterly pointless.
Because of Original Sin. Because Christ is the new Adam and the Theotokos is the new Eve, they have to be, like Adam and Eve, have perfect human nature. Because Adam and Eve were made without original sin, Christ and Mary too should not have it.
Not only is this so, but we also rejoice in God through our Lord Jesus Christ, through whom we have now received reconciliation.Wherefore as by one man sin entered into this world, and by sin death; and so death passed upon all men, in whom all have sinned.
The point so, of new Eve and new Adam is not the way they were made, but what they accomplished. That is they did obey God to the End, what Adam and Eve were supposed to do, but didn't.
Justin Martyr: [Jesus] became man by the Virgin so that the course that was taken by disobedience in the beginning through the agency of the serpent might be also the very course by which it would be put down. Eve, a virgin and undefiled, conceived the word of the serpent and bore disobedience and death. But the Virgin Mary received faith and joy when the angel Gabriel announced to her the glad tidings that the Spirit of the Lord would come upon her and the power of the Most High would overshadow her, for which reason the Holy One being born of her is the Son of God. And she replied, "Be it done unto me according to your word" (Dialogue with Trypho, 100).
so that the course that was taken by disobedience in the beginning through the agency of the serpent might be also the very course by which it would be put down.
This is the meaning of New Adam and New Eve.
Irenaeus “Consequently, then, Mary the Virgin is found to be obedient, saying, "Behold, 0 Lord, your handmaid; be it done to me according to your word." Eve…who was then still a virgin although she had Adam for a husband — for in paradise they were both naked but were not ashamed; for, having been created only a short time, they had no understanding of the procreation of children…having become disobedient [sin], was made the cause of death for herself and for the whole human race; so also Mary, betrothed to a man but nevertheless still a virgin, being obedient [no sin], was made the cause of salvation for herself and for the whole human race….Thus, the knot of Eve's disobedience was loosed by the obedience of Mary. What the virgin Eve had bound in unbelief, the Virgin Mary loosed through faith (Against Heresies 3:22:24).
The parallel that St Irenaeus is making is Eve desobediance vs Mary obediance. Mary did what Eve should have done. Nothing to do with the way Eve or Mary were created. As such, expressions such as new Eve do not necesarely imply the immaculate conception of Mary.