The will to dream? 
I suppose the extreme upside or perhaps the purpose or at least, the attempt of it, of photography is, to make the world actually more beautiful or see more beautiful than it actually may be perceived?
For example, I think especially with black and white, high contrast, monochrome etc.… The great interest and innovation is, we do not see the world in black-and-white, therefore, black-and-white photography forever becomes interesting worthwhile and joyous because… It renders or up cycles the world it makes it look even more ever so beautiful?
And therefore, I think the purpose of photography should be to beautify reality, 
Live more and optimize your life for photography