The Rosary is not vain repetition. In particular, when one prays the Rosary, they are supposed to be meditating (deep thinking about) a certain set of events from the life of Christ and/or of Mary, depending on the day. (E.g. the annunciation,
the presentation of Christ in the Temple at 8 days old, etc.)
Actually the Presentation was when Jesus was 40 days old—that is why it is celebrated on February 2, 40 days after Christmas.
Right. And you don’t worship Mary and Saints either.