When I went upstairs to get my cereal this morning (in our house the kitchen and dining room are upstairs, one thing among many that are backwards) one of the brothers had left one of the newspapers open to an article about celebrities and famous people who had dismissed their Catholic faith. Displayed were some of their sarcastic incredulities and criticisms.
To me it just pointed out the sad fact that, from what I observe, many Catholics were simply never introduced to a faith that an adult could believe in. You can tell a child that there is such a thing as "God" or make them tell you that the Risen Lord is present under the appearance of bread and wine, but if that's all they ever have, of course they will reject and mock it when they grow up.
Utterances like, "I believe in God the Father Almighty, Creator of heaven and earth," or "Take and eat. This is my body," are exceedingly complex and subtle, filled with a history of reflection on what it means to be a human being, what it means to exist, what it means to realize there is something rather than nothing in the universe. If someone only knows these things as data, they will soon be rejected as unbelievable or at least irrelevant.
This is why I believe so strongly that everyday Catholic preaching needs to move away from a light moralizing on daily life that is functionally unitarian, and get into the central mysteries of the faith, in such a way that people can be helped to step into them.