Maverick,
Your error is in saying that they "produce nothing". You're wrong. They produce nothing of value to YOU PERSONALLY, but to millions of others, sports players are providing something of value, something worth paying for, and just as importantly, doing something with a level of proficiency and appeal that only an extremely small percentage of people are capable of.
That makes their skills a marketable commodity, and they'll get paid relative to what people will pay to see them play, just like a particularly nice brand of toilet paper will cost more because certain people like using premium toilet paper. Just because YOU don't like premium toilet paper doesn't automatically mean that premium toilet paper should cost less...
If it's nice and not easily available or attainable, it's value will go up. Skill in sports, acting, or as a surgeon, is not common so compensation for practicing or displaying those skills should reflect that.
Otherwise you're either jealous beyond your ability to apply logic, or you're a commie
