Many good points have already been made, and I apologize if I repeat them while attempting to build on them.
Vatican II reiterated what the Church has always taught, that the faithful should study scripture on a regular basis. However, the CC has always cautioned the laity against interpreting scripture on their own. The Church wants people to ask questions about what they are reading. That is how we grow as individuals and as a community.
We do not grow when we blindly follow along or when we choose to say we know better than 2,000 years of the best and brightest theologians.
As has been pointed out, many people in the early church could not read, and Bibles were not just books but works of art to rival those of the great painters and sculptors. Every page of vellum was hand made. Every character was written by hand, and every decoration drawn by that same hand.
This made the Bible one of the most valuable books in the world. To allow the faithful to have access, the Church chained Bibles in their early parishes to keep them from being stolen.
Because people in the early church couldn’t read, the Church paid for art to represent the important characters and stories of the Bible. It allowed them to connect with the words they heard in the Mass or read in the Bible but didn’t understand.