Mary has no more power to “bless” anything than my Great Aunt Fanny has. Sheesh! Idolatry run rampant.
The prayers are supposed to be for Mary to pray for us to be Blessed by God the Father, not to bless us herself. And she (or her image) is not to be worshipped (idolatry), only honored.
On the other hand, though she was virgin at Jesus' birth, he had siblings, and in Jewish tradition, IIRC, an unconsummated marriage is no marriage at all. That has never been adequately explained, to me anyway.
Shhhh they have a "mary god"