None of us really get into photography for the initial sake of helping people, we may get those intentions over time but it's not often those are the reasons we pick up a camera. It often is though the by product of doing what we love. Some where down the line as photographers we realize that what we do can have some real influence in the world as well as the people around us.
It's a rewarding feeling when you can express yourself artistically, capture a moment in time, a moment that can last a persons life time and still have that bring a lot of positive aspects to a persons life. A simple portrait may help someone bring confidence into their life. A candid shot can preserve a memory for future generations. A product shot can help drive a business in sales. Looking in the mirror each night knowing that you are responsible for that sort of creation, no matter how small or intangible it may seem at the time, is a good feeling. We don't think about it often but it's nice outlook that can help drive us further. We are lucky, we get to create instead of destroy, and it's quite simply a beautiful thing.