That's why I emphasized they are *part* of the entire sports industry.
Point is - if you want to make big money, serious money, you need to become very, very skilled at something, such that your services are seen as essential; you can start your own business; you can come up with original ideas which are marketable and add value to something; you can be a top manager; so on and so forth.
Relatively few people in the U.S. become rich because they inherited money. Nearly all of the top 1% are in that group because of their own skills, abilities, and achievements.