It's a bit like re-watching an old movie; The special effects always look laughably cheesy and awkward, even though at the time, they were impressive and state-of-the-art.
The Catholic rituals, costumes, and decorations, that wowed the masses in the Middle Ages, just don't cut it with modern audiences. Their cathedrals were once by far the tallest buildings in the world; their clothing, walls and windows were by far the most colourful things a peasant would ever see - to a man who lives with his wife, his four surviving children, and his cow, in a one-room windowless wattle and daub shack, and who can only afford undyed, low grade wool for his clothes, the medieval church was stunning and spectacular. To people who live in vibrant cities with skyscrapers, colour TV and movies, and cheap, brightly coloured plastic gewgaws freely available seven days a week, it all looks a bit overblown, garish and silly.