We rely on others more than you might think. You rely on your sensei to teach you how to become a better shinobi, you rely on your friends to help you in battle and to push you to get stronger, you rely on a blacksmith to make your weapons, and you rely on farmers to grow your food. We are all interconnected in some form or another and to think that you can go about your life with only your own strength and abilities is the epitome of foolishness. In all honesty, you are never really alone.