The significance of photography lies in thinking about what theme is expressed in literary works. What else is the point of photography? What is artistry?

You are absolutely right! "Photographic works" should have a clear theme. If the theme is properly expressed, it will arouse people's voices and touch people's hearts, which has positive social significance. At the same time, photographic works should be exposed correctly in technical means, with prominent subject, perfect color tone and unique lighting, so as to give people artistic enjoyment. It is precisely because of this ideological and artistic nature of photographic works that they will be passed down from generation to generation. Otherwise, it is not a "photographic work", but a "photo" at best!