Unlike most of life, what you do really matters. Your actions have real consequences. You have to pay attention and focus, and that's very satisfying. It forces you to pay great attention and you lose yourself in the task at hand. Without the risk, that wouldn't happen, so the risk is an essential part of climbing, and that's hard for some people to grasp. You can't justify the risk when things go wrong and people die. The greater the risk, the greater the reward in most aspects of life, and in climbing that's certainly true, too. It's very physical, you use your mind and your body.