The overwhelming emphasis in this very repetitive prayer is TO Mary.
IIRC there are over 50 prayers directed TO Mary.
Like a little toddler saying "I love you Mommy, kiss kiss kiss kiss kiss "(repeated ad libitum).
Or like the holy Winged Ones of heaven, "Day and night they do not stop exclaiming: “Holy, holy, holy is the Lord God almighty, who was, and who is, and who is to come.”
Or like the Holy Spirit, who comes and dwells within us, and who prays unceasingly. It is not math. It is not a numbers game. It is not vain repetition. It is devotion.
We invoke Mary, and all the angels and saints, because we are all praying together This is called the Communion of Saints, the Body of Christ.
In the Rosary, we are not just saying words, we are loving God with our whole mind. The *whole* mind.
Please understand, that includes several levels of the brain: the automatic part, which starts to say the words habitually, like the bass line in an ensemble; and the intellect, which is then free from distraction and able to meditate on the events of the Life of Our Lord --- thus having fellowship with Him and "taking every thought captive in obedience to Christ."
It is wonderful to pray this way, with Mary and the angels and saints, ALL of us centered on Jesus our Head, our King and our God.