The Photo and The painting

I often have this moral dilemma, when ever i sit to paint ie., what is it that iam adding to the photo by doing a painting out of it.   My references to painting ( in whatever few i have done) are usually from photographs and real life . Photographs by others, even if they are good, i dnt feel the inclination to do it as much as  i have for places i have seen and clicked myself . 
I have seen many of the artists playing with this same question, some have found answers and some have found wrong answers. Not surprisingly, i have not got the answer(s) to it yet. But, right or wrong,  Finding as answer is crucial, else it will work against your painting morale, or may even pave way to losing ur artist-self ( may not have such huge consequences, but i have insecurites about my paintings on similar lines, but i usually drive it away by assuring myself that there is a long way to go before i have to confront these consequences )  . I keep thinking about this question often where ever i stumble upon it.

Painting and the Photo:

The video discussing about what a photo cannot achieve and what a post processing can. check here. Though the lecture has nothing to do with why i have put it here, but as always i pick the most tangential thing out of anythingthat is put to me.
And what is it about, rendering what the eye actually saw, to what is actually out there, to how much justice you or the camera are doing to it, and who is superior amongst the both.