Just like the Mormons read the Bible through the filter of the Book of Mormon and the Jehovah's Witnesses read the Bible through their Watchtower literature so do Catholics read the Bible through the filter of their Catechism. We all know that at one time, the "lay" person was not permitted to even read the Bible for themselves. There was concern that a person could not possibly understand the Word of God without a clergyman there to explain it all to them. Yet the Bible was all the early church had after the Apostles died out. They had ensured that other stalwart men would continue to preach the true faith to the believers and they left their writings - divinely inspired writings - to ensure the faith would continue. The Bible is God's guidebook, a maintenance manual, for mankind. It is his "love letter" to us so that we don't have to guess about what he requires of us.
There's nothing wrong with commentaries and theological writings of students of Scripture and we are blessed by still having access to the thoughts, struggles and illumination of men and women of God as they grew and matured in their knowledge of him and still do. But they are NOT a replacement for each one of us going into the Word and grasping the truth that the Holy Spirit makes real to us. It is NOTHING to be afraid of and if I was a pastor, I would want my people to know what they believe and also why they believe it. Only egotists expect everyone to swallow their every thought. Paul told Timothy to study the Word to show himself approved and a workman that never needed to be ashamed.