There is something about sacramentals that cannot easily be explained, though. According to the CCC,** they dispose us to receive Grace**. This is no small thing, and can be a tremendous help on our path to holiness and in fighting against sin and the dark realm.
I wear the Miraculous Medal of Our Lady and she said those who wear it with faith shall receive great graces.
Superstition is one thing, but to wear a sacramental with faith can be a great spiritual good, even though it won’t stop us from committing sins of grave matter or whatever else. It does have spiritual efficacy that is not so easy to explain. It is a great reminder, too, of course, but it is more than that.
The devils hate sacramentals.
O Mary Conceived Without Sin Pray For Us Who Have Recourse To Thee.