I'm not getting the point. You're denying the esoteric teachings? I thought only Protestants believed that the humblest milkmaid could read the Bible and understand it perfectly.
Yes, Catholic Christians deny hidden revelation. Now, that is not the same as the milkmaid theory, which is wrong. The revealed truth may be very hard to grasp, especially for a proverbial milkmaid, but there is no intention on the part of God to hide them. The perfect example of that, is, by the way, the revelation of nature. No one said milkmaids should take the commanding heights of science. But God gave us the universe the laws of which we can apprehend over time. It is not a closed book.