You sure about that?
https://www.catholicnewsagency.com/news/what-do-catholics-and-eastern-orthodox-disagree-about-anyway-78674
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Jesus was sinless and divine and yet felt pain and died. Yet, somehow that doesnt apply to Mary, just to prove your point?
Scripture is clear that Jesus was sinless.
Scripture is also clear Mary was not sinless.
The Orthodox say she is pure and sinless, they just don’t define when. They haven’t gotten around to saying when. I could find some bad Catholics that agree with you, you can always find someone to agree with you, problem is they lack authority.
Scripture is clear that we, as St. Paul says we must work out our salvation in fear and trembling. Thus we are not saved until we make it to Heaven. Yet, Mary said “God my Savior”, because she was already saved from sin by God. It’s in scripture if you care to look.