There is a whole lot of what you wrote that isn’t found in the scriptures..
Here’s a dilemma with the doctrine of the Immaculate Conception of Mary..
The premise of the doctrine infers that Mary and Christ had different flesh, sinless human flesh, incapable of sin.
Flesh that isn’t the same as the rest of humanity has.
The bible says He most assuredly was tempted.
It wasn’t His Holy Spirit that was tempted.
It was His human flesh.
The flesh with the sin nature.
The scriptures warn that those who confess Jesus didn’t come ‘in the flesh’ is a Spirit of Antichrist.
By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God; and every spirit that does not confess Jesus is not from God; this is the spirit of the antichrist, of which you have heard that it is coming, and now it is already in the world.
2 John 1:7
For many deceivers have gone out into the world, those who do not acknowledge Jesus Christ as coming in the flesh. This is the deceiver and the antichrist.
Some may see ‘coming in the flesh’ as that He was real,not a ghost or a hologram.
Some may see ‘coming in the flesh’ as having the same sinful human flesh nature, yet having His holy Spirit conceived, where the rest of us, have the serpent seed of our earthly father cast down to our mothers egg..
That’s what made Him different.
Not His flesh was different.
But His Holy Spirit.
His mother was conceived by her fathers seed and her mother’s egg..
She wasn’t a super human with different flesh unable to commit sin.
That sort of doctrine, according to scripture, is Antichrist.
And may be why Protestants and Catholics fight one another constantly.
They may ultimately realize that they have two different Mary’s and two different Jesuses. Or they’re arguing over the wrong Jesus.
Maybe thanks to this one doctrine.
Among other things taught about Mary and Jesus, like the 15 promises..
Dogma and doctrine may be best left to one’s own group.
If it gets into the hands of others, they may be compelled to test and prove all things with Genesis to Revelation.
Did Eve sin?
What "premise of the doctrine" do you think "infers" (I believe you mean "implies") that? Jesus is a divine person , with a divine will which is perfectly in agreement with his human will. He was incapable of sin. Nothing in the dogma of the IC claims that Mary was incapable of sin.
Nothing in Scripture teaches that original sin is some sort of disease transmitted exclusively by fathers to their children. That may be your understanding, but the Bible doesn't require it.
Our understanding is that it's more like a failure to transmit grace and other gifts which, had the fall not occurred, would have been transmitted in the natural process of childbearing.