Ah, there is more on heaven and earth, Leland, than is dreamt of in your philosophy.
Of course individual works stand well on their own, but they are also in dialogue with one another. Each book, each author or philosopher is a voice in conversation with other voices. What St. Luke's and others are suggesting is not a monolithic entity at all, but a diverse, rich and heterogeneous conversation among voices from age to age that weave together to help form the fabric of the culture, art, values, behavior, beliefs and so on of our own age.
But, of course it is alright if you personally aren't getting anything out of certain works at this point in your life. You have lots of interests to explore and things to work out, and it may be absolutely true that you're not in a place where you appreciate or get much out of certain kinds of literature. That's why many people on this thread started out by saying that you probably aren't at a point in your life when this is meaningful for you, and that this is not a bad thing, but that you just need to recognize that this doesn't mean that the books themselves are not potentially meaningful works or that there may not be another point in your life when they are meaningful to you.
As I write this I can't help but think of the first line of the Divina Commedia. I'll quote the opening stanze: