When I attended Catholic grade school and high school we were assured that there was no pressing  need to study scripture or theology because the Church had already done that on our behalf. With a great deal of confidence the priests and sisters  told us that if we took the Baltimore  catechism to heart and lived accordingly everything would be fine. It was enough to know that we were in the one true Church and other Christians were beyond the pale. We were not concerned with defending our faith or  debating the merits with non believers who were likely to go to hell. It was a much simpler time.