Yes, I see what you mean quester. A camera can capture existing light only. It is the very principle of photography. However, some space for creativity is still there. Even for purists proud of "unaltered" output from their camera (that I do not truly understand in general, to be honest, as it seems to be a very limiting approach although, naturally, depending on the intention as always
). One can prepare the scene to be photographed (using a spray to make dew drops that were not present before for instance), one can alter the light (using artificial lights, coloured reflecting surfaces, mirrors, shades, etc), one can even literally paint by light (you sure know painting by a flaming branch or an electric torch captured in dark night using long shutter speeds) or directly by a camera (moving the camera instead or also), and so on, and so on.
The photographer's mission seems to be quite harder, comparing to contemporary painters, when questing (not only) surreal tasks of their unleashed artistic minds; a photographer needs not only to "invent" the scene, the contents, but also the way how to transfer the idea on the film (digital chip) using the light instead of paints (if one does not want to paint over raw photo stuff in post processing that also is possible, and widely used, though usually not considered to be a "pure" photography anymore; although "how about retouching?" might be a good question here). "Just" looking for, seeing, and shooting is just one of many possibilities. For instance, how about photo-montages and photo-collages both as old as the photography itself?
Peter