
That is an interesting question and there are probably as many reasons why as there are photographers. But I think when we all step back for a minute and really think about it, we are all documenting our lives and the world around us.
Here is a link to photographer Jack Radcliffe's gallery. The gallery is comprised of photos he took of his daughter Alison growing up. From the early carefree days to relationships, trials, and adulthood. He writes about the way he would bond with his daughter and expose her to the camera from an early age. This enabled him to connect and photograph her in moments not normally captured on camera. (At least not by the father.) I also like how he says, "I wanted to photograph her in all her extremes, and to be part of these times in her life without judging or censoring." I know how hard that is to do as a photographer. I am constantly thinking about and judging. Not necessarily what I am shooting, but how people will perceive the final image.
Looking at his photos motivates me to capture life as it really happens and not so posed. There is a time and place for each, of course, but also accepting what your photo is without judging it. It is a fleeting moment that is already passed the minute you click your shutter. Accept it and enjoy it for what it is.
Alison by Jack Radcliffe