Familiarity breeds...

… knowledge

comfort

predictability

consistency

And no doubt a few moments thought would produce a few other virtuous results of deep and regular knowing.

Of course, it depends on the object (the thing with which one is familiar) and the subject (the one being or becoming familiar). Familiarity with the contemptuous and for the contemptable no doubt breads contempt.

Now apply to liturgy and The Lord’s Supper.