I find this practice absolutely foolish. Any one who follows any "Church" doctrine without question , and forgoes studying the scriptures for themselves, can easily find themselves being led by men and not of GOD.
Such was the case with Jim Jones, or the Branch Dividians, and we remember how those turned out!
To the extent that Catholics have any exposure to their Faith at all -- which usually means, to the extent that they go to Sunday Mass --- they are invariably directed toward Scripture. EVERY Sunday Mass has 4 major readings (the Old Testament lesson, the Psalm, the Epistle, and the Gospel) and at EVERY Mass we pray to the Holy Spirit for understanding.
You can get a Catholic Bible at Amazon.com for one cent (plus postrage!) and no Catholic has any excuse not to have it, read it, or revere it.
Conceding --- with sorrow --- that the sermons are often pathetic, and the religious teaching in Catholic schools often shockingly deficient, still I must say that Catholics who are religiously ignorant ar so for the same reasons that Protestants, Jews, or anybody else is religiously ignorant: distraction, social conformity, and sloth.