Only a certain few can be professional athletes, hence the elite group is payed so much. It may not seem 'fair' to you but it's all based off supply and demand. People want to see sports games. And that means you can jack ticket prices up which pays for the players basically. Being an athlete isn't 'easy' either. You don't just catch a ball or kick a ball.
When you look at EVERYTHING you can make it very simplistic. Banking and finance, just adding and multiplying numbers, business, selling things etc. Just because it seems simple on the outside, doesn't mean it's simple on the inside. Being a kicker, people just say 'Oh all you do is kick a ball'. It's MUCH more than that.