People go to see beautiful paintings to see how much they cost. Wow. The practical value is that it shows you what the human spirit can do.
I only do business with the people I do business with. The people I do business with find out I do business with the people I don't do business with.... I can't do business with you.
Does any art have a practical value? People love to talk about how expensive a painting is. That's the only way we can talk about paintings in this century.
The only riots were the people trying to get tickets.
Does the New York City Ballet affect other places? Yeah, it lets people know they should come to New York.