Shooting the homeless, sick ederly, and those enhanced with life struggling problems.

These topics should be photographed, with sensitivity to the subjects and also with an ability to show a possible solution to their problems.
It is very easy to walk in any city or countryside worldwide and find the above topics and photograph.
What you do with the images, what advococy you bring to the causes, that is important. Injustice, poverty is worldwide, the camera can expose this.
How you as a photographer can tell the story and bring forth some solutions is important.
I think Salgado was not the first to photograph the displaced people of this world, but he made sure their plight was recognized.
A casual sampling of homelessness just does not cut it today, How do you as a photographer offer something to their situation, that is what is important.