God thought highly enough of Mary to have sent her to earth as his messenger (as opposed to sending an angel), on at least two occasions.
One was her miraculous apparition at Guadelupe. Now, the thing about this is that it was THIS, in particular, and not the Spanish missionary efforts, that very rapidly produced a sweeping conversion of vast numbers of native people throughout Central America.
The Spanish were not loved, because they were not lovable, and their Church was an odd, foreign imposition - not as bad as the Aztec human sacrifices, to be sure, but alien and hostile.
God sent Mary as a messenger, not to the Spanish, but directly to an Indian. He then went and showed the Spanish. That changed things, for now God was speaking to the Indians through his messengers, WITHOUT the priests, and the priests were tagging along as the Indians turned to the truth of God THROUGH the Mother of God.
That is why the Lady of Guadelupe is the patroness of all of the Americas, and it is why the Mexicans are so tenaciously, unyieldingly, irretractably Catholic. They drove the Spanish off soon enough, but the thought of driving away the Church was unthinkable, for God sent his messenger directly to them, not a mere angel, but Mary herself.
Paul was responsible for bringing the message to a few thousands of Greeks and Romans, here and there. But Mary herself brought the millions upon millions of Amerindians to God. They were not on the way to getting there under the Spanish, for the Spanish had been cruel.
Because the Amerindians had Mary as their missionary, in one simple apparition, by the millions they went over. By contrast, mere living men were never able to do that with Africans, or Asians, or Europeans, or the other Indians beyond the scope of the Mesoamerican apparition.
The missionary work of Mary in this regard was the single most effective conversion effort anybody ever did - so fast, so vast.
The second apparition was at Lourdes, where of course we see Gospel-era miracles played out in real time, with a really alarming frequency.
Neither of those things are in the Bible, of course, because they came long, long after. But they are real. And given the intense power to convert and convince that these Marian missions from God demonstrated, and still demonstrate, the singular certitude and devotion to God and his Son, and to his mother as well, the importance of Mary is not a matter of doctrine, it's a matter of demonstrated miracle and power of God.
That's why it's inappropriate to pit the Bible against that. The Jews did that, pitting their words of Moses against the power of God manifest in Jesus, because many of them could not square the circle. The smart ones stopped trying to square the circle and believed on the obvious miracles that nobody but God could do.
The same miracles are displayed at Lourdes, where Mary visited. And of course the hundreds of millions of Latin Christians are today the spiritual descendants of the mass conversion event that Mary's mission to Guadelupe fostered those many years ago.
What God hath wrought with divine power through Mary, quite visibly, is not for us to gainsay. We must accept it for what it is, just as the smart Jews faced with the surprise of Jesus did. The dumb Jews turned inward on their book, did not find him there, and so turned viciously on God by attacking him.
When God manifests his power in the world, you have to go with it, even if it's not what your teachers and your own reasoning had caused you to expect. Mary should not be worshipped, but she must be acknowledged for what she is: the most powerful messenger for conversion and demonstration of divine power that God has sent to earth besides Jesus Christ. Mary's appearance in Mexico converted more people to following her son than any other missionary activity in human history.
It is what it is. We should not become Pharisaic and kick at the goad. God did what he did. We cannot prohibit God from doing so because it's not the way we read a book.