Let's see...
Apostles' Creed
"Our Father".
"Hail Mary" x3.
Rub-a-dub.
Meditate Mystery.
"Our Father".
"Hail Mary" x3.
Rub-a-dub.
Meditate Mystery.
Lather. Rinse. Repeat... for other 18 mysteries.
Same thing next time.
And next.
And next.
Ad infinitum.
Vain? Check.
Repetition? Check.
Much speaking? Check.
Now we're off to confess our sins to a man for absolution and penance.
Then on to some idolatrous veneration of a few dead folks to reverence man.
Check out all the graven image statues to remember their names.
Chant with me... "My Father plays Dominoes bettter than your Father."
Wait. Start over. I forgot to cross myself. Head. Crotch. Armpit. Armpit.
Bring on the written prayers and the sermonette about cultural current events.
I fail to see how meditating on the life of Our Lord is vain. While you may not get much out of it, praying to God, while meditating on Jesus doesn't seem vain at all.