We completely accept the modern paradigm of progress. Each generation is superior to the one before. Each world view is better than the one before. This is the perspective of science--each generation builds on the body of achievements of the one before, but in the immortal words of Sister Wendy "Art starts at the top."
Beethoven isn't better than Mozart. Mozart isn't better than Bach. They have just organized their materials differently. An unbroken line of increasing complexity isn't possible. Our brains, our listening brains can't take it all in.