Real Catholic Music

After posting the last piece about gospel music, I found this on the same site:

The Catholic mass which Beethoven called the Missa Solemnis is rarely performed. It's eclipsed by the better-known Ninth Symphony. But taken together, the two works shed light on the composer's spiritual world view.

The Missa Solemnis may be the greatest piece never heard. Nearly 90 minutes long, it requires a large chorus, an orchestra and four soloists. It's impractical for the concert hall and fits far less comfortably into a Catholic church service.

Link.

Now, I don't know much about music, but I remember the Lutheran Church of my youth and its wonderful hymns. A Lutheran friend and music lover told me that the Lutheran hymns aren't far removed from classical structures (whatever that means), hence Bach is still respected in Lutheran churches' liturgies. Why doesn't the Catholic Church liturgy still respect Beethoven and other Catholic composers? I have Thomas Day's Why Catholics Can't Sing on the shelf. Maybe I should take it down and start reading it again.