Why was Suzy mad they used franny last photo for her funeral

In the final section, Suzy describes the picture included on the program for Franny’s funeral. It is the same one she described being taken in the introduction to the novel. The reader now knows that in that introduction Suzy was guessing what a few of the last minutes of Franny’s life might have been like. She imagines her friend looking out at the sea as her mother took her picture. Notice that Suzy believed it was cruel for that photo to be the one chosen for the program as it was printed on the program that the picture was taken the last day of Franny’s life.