Because natural talent alone is not sufficient to be the best at something. It takes time and work. Fans only see the end result, and miss the life dedication to achieving that result. When genetic talent plus insane work ethic collide you get people like Michael Jordan, Kobe Bryant, and LeBron James. Without a work ethic they all may have made it to the NBA, but I doubt we would have known their names. You also have people like Steph Curry, who at least on the surface isn't a genetic freak, but has been practicing basketball since before he could walk.

Knowing he’s ordinary, he’s always trying to improve himself. No one appreciates the agonizing effort he’s had to make. Now that his years of training have yielded such spectacular results, everybody’s talking about his ‘god-given talent.’ That’s how men who don’t try very hard comfort themselves.” -Musashi