There are hurdles to overcome in sport and in life. Sport is a very valuable learning ground for how to live your life in the best possible way.
There's never going to be a decathlon that you're going to have 10 events that your satisfied with. You're always, always going to be dissatisfied in something, and that always draws you back to try to retry that the next time you do a decathlon. It's like you go for the perfect 10.