@monsterislandcolonizer @chud @Deplorable_Degenerate @Ash_Kvetchum > If Mary was sinless then her death would have been a perfect sacrifice as much as Christ's was, and the death of Christ would have been unnecessary or redundant.

Oh, no friend. That's not how it works. At all. You are thinking of a model where man needs some sinless person to sacrifice & that would fix the problem of fallen creation. I have to point out: that is missing the entire concept of the Incarnation.