I did not see in that link where Mary's parents were declared sinless. Are you saying Catholics believe Mary's parents to also have been sinless?
This is the point. If Mary is required to be sinless because Jesus was perfect and sinless, then her parents should have been as well, and their parents, and so on, as far back as you can go. Otherwise, you're stuck with the problem of sinless perfection coming from sinful, imperfect beings.
Mary was conceived without original sin....wasn't that your original complaint and denial???
Anne and hubby, much like Sarah and Abraham could not conceive a child. Hubby prayed, and Anne prayed for a child, and both were given a message from God, that a baby would be born to them, and all would know her as Blessed....or something like that.... I presume in the same manner as an angel came to Mary, and she bore Jesus...
In other words....it was not under any natural humanly measures or circumstance, it was done by God...it was not normal....like in today's world could be compared in earthly terms as an artificial insemination...sort of....
But honestly, I never knew your complaint was a real issue about St. Anne...my mother in law never brought that up with me...
And I could care less, and I Trust in God to make whomever pure and sinless for whomever He plans to come, according to His plans...
This is such a tiny tiny and petty thing that Satan likely planted... and made bigger to divide Christians...he is the Divider, in the Bible among other things.....and loves us arguing on
off message tiny topics rather than spreading the Gospel of Jesus Christ.
Remember, division is Satan's tool, NOT God's.