Demonic activity.
You're incorrect.
“sheer force of repetition”
Sort of a hilarious accusation when you consider “Say twenty Hail Marys”, or mumbo-jumbling while fondling plastic beads.
Not at all. Quoting the phrase "it is written" over and over does not prove Sola Scriptura...which is itself a man-made doctrine, around 1500 years after Christianity started; and which had not been promulgated by any branch of Christianity until the reformation.
And when one prays the rosary, one is supposed to be meditating on specific events in the lives of Christ and the Apostles.
As the closing prayer for the rosary comes out and says, "O God, whose only-begotten Son, by his life, death, and resurrection, has purchased for us the rewards of eternal life; grant, we beseech you, that we who meditate upon these mysteries of the most holy rosary of the Blessed Virgin Mary, may imitate what they contain and obtain what they promise. We ask this through Christ our Lord. Amen."
I would not toss around the phrase "man-made" so lightly...
https://catholicism.org/rosary-history.html
Tradition does hold that St. Dominic (d. 1221) devised the rosary as we know it.
Must be hard - meditating on one thing while speaking something else.
“As the closing prayer for the rosary comes out and says,”
You’re making the assumption that the rosary prayer is Divinely inspired.
The rosary was invented by man. Using that as as apologetic for its own words is not logical.
I could make up any outlandish narrative. If someone questioned it, I could reply, “Well, as the closing sentence says...”. I’d be ridiculed.
“when one prays the rosary, one is supposed to be meditating on specific events in the lives of Christ and the Apostles.”
I can do that without tchotchke.