I'm not disparging anyone. I'm simply stating what is the current view of the Catholic Church. Catholics do not believe in the blood atonement of Christ so there is no need for Mary to have had her "debt of sin" paid. Christ dead showed us what true love and obedience is all about. This is very similar with the Orthodox view.
I have given you a reference to the Catholic website of NewAdvent on the Atonement in the above post so that you can read it for yourself. Don't yell at me.
But, what is the current position which YOU hold on the question of grace, sinlessness and death?
And how do you get ONLY "example" out of a statement which, as I showed by highlighting mentions also paying "debt" and "sacrifice?".
AND, (pant, pant -- typing fast here) would you say that we can know all we need to know about God and what He wants without the revelation of Christ's life? I would say that PART of how he restored the estrangement was through the revelation which He Himself was -- and that kind of thinking lies behind the "example" language in what you quoted.