Skateboarding can be enjoyed by many different types of people. There are people who skate just for fun and then there are professionals who actually make a living by doing what they love. Big competitions such as the X games can offer large payouts for the best skateboarders.
If you think that you could never be as good as skaters in competitions, you need to stop thinking like that! You may not be able to do all of the amazing tricks that they can right now but that is what practice if for. Professional skaters did not wake up one day and have the talent that they do. They had to put a lot of blood, sweat and tears into their skateboarding skills and that is why they are as good as they are.