There is no reason why the Louvre should be your favourite gallery just because it has the grandest collections in France, any more than Kew should necessarily be a favourite garden because it has the largest assemblage of plants, or Tesco your chosen shop because it has the widest variety of canned beans.
Why are we reading a Shakespeare play or 'Huckleberry Finn?' Well, because these works are great, but they also tell us something about the times in which they were created. Unfortunately, previous eras and dead authors often used language or accepted as normal sentiments that we now find unacceptable.