Photography is the only major art in which professional training and years of experience do not confer an  insuperable advantage over the untrained and inexperienced—this for many reasons, among them the large role that chance (or luck) plays in the taking of pictures, and the bias toward the spontaneous, the rough, the imperfect. (There is no comparable level playing field in literature, where virtually nothing owes to chance or luck and where refinement of language usually incurs no penalty; or in the performing arts, where genuine achievement is unattainable without exhaustive training and daily practice; or in film-making, which is not guided to any significant degree by the anti-art prejudices of much of contemporary art photography.)

Susan Sontag en Regarding the pain of others.