Sure, add a few more lines or chapters to explain you picture.
So, should I have told you that this is one of 50 photos in a series about Cuban people? I like to think that those who see the series and read the captions end up with a good idea of what Cuban people and culture are all about, thus learning something about what Cuba is all about.
Or, should I have left this as a random singular image with no context?
It's a different strokes for different folks thing. I know what I am trying to accomplish. No problem is your goals and objectives are different.