I'm not saying that everyone should swim with sharks, but sometimes you have to jump over your own shadow in order to learn something that you will never forget for the rest of your life. Then you know you can conquer your fears.
You are led through your lifetime by the inner learning creature, the playful spiritual being that is your real self. Don't turn away from possible futures before you're certain you don't have anything to learn from them. You're always free to change your mind and choose a different future, or a different past.