Thanks for your reply.
It is obvious that the pc, the digital cameras and so on are a great advance. It is obvious too that adjusting contrast, color balancing, etc. is a must. The pictures which comes from the camera are absolutely rough and must be adjusted. And yes, I know that the quality of the picture depends on how it was taken, including the light, the exposure times, the film (used or emulated), etc.
Colours, as an absolute entity, does not exist, it depend on the light and on how the surface reflects it, aside all the physical theory behind. I was using a projector to print my own photos, so I can understand you when speaking about this, I'm not an expert, but there is something I know, as I know that there is a real difference between 'classical' (reflex) and digital photography.
I'm not sepaking of this, I'm asking about retouching photos, which is a different task. This does not means that all the beautiful pictures we see are retouched. They can be balanced, corrected, etc., but this for me does not mean retouched.
Let me use an example. If I know that a color must be white, I expect to see it as white. White can be more or less bright, dark, it can tend to gray, yellow, ocre, but must be white. Now if I see that white becoming sand, that is not white but sand. I can do a reverse engineering, trying to alterate the colour balancing to see how the others colours changes. But if when getting back the sand to the white, the black, which in this figure must be black, goes to red, so something wrong happens.
Most of the posted pictures are balanced, etc., that is right but I'm not talking about this. Take 100 pictures of different guys, 98% are right, but there is a 2% which is retouched, I'm saying retouched, not balanced or adjusted. A gold helm, which is painted as pure gold, cannot goes by itself to a beautiful, ancient, thousand bronce tones colour. If you see, with your eyes, a figure really good painted, surely it is a beautiful painted figure, but that is, a painted figure. Such figure cannot transform itself in a figure where all brushstrokes disappears, where colours blending seems to come from a make-up artist and where colours saturation transforms the flesh into a painting of Tiziano.
And no, I do not agree about the learning curve/usage times of photo retouching tools. Such tools are surely complex, but not so hard to handle.
I'm sorry, but english is not my language, so I cannot express it as I would. My only fear is to be misinterpreted, I'm not speaking of all the beautiful pictures we see, only about this 2%.