As a Catholic, even I recognize that essentially the entirety of Catholic practice is superstition from the perspective of anyone who doesn't either take Catholicism as a priori true on authority or (arguably equivalently) have a personal divine experience justifying Catholicism experientially.
If one is not Catholic to start with, it as easy to dismiss Catholic practice on the same argument as presented above against superstition as it is for Catholics to do so for non-Catholic superstitions.