Those of us old enough to remember will recall mothers and grandmothers reciting the Rosary during Mass to try and participate in some way.
Good grief - wasn’t this old reinforcement for an ignorant argument finally killed off?
Those of us old enough to remember would have no reason or ability to question why a person was reciting the Holy Rosary during Mass. Had they been given lobotomies and rendered unable to participate in the Mass because they had a rosary in hand and their lips silently moved? Those who feel the need to “know” if a person is participating in the Mass, and guessing about those they think are not, have a severe nose problem.
The rosary is a sacramental and is a wonderful method of prayer. One can say the rosary while assisting at the Mass (if you have learned how to do so) .