It certainly could have been a random shot, with balloons by accident, or the people by accident, or whatever. I have come to terms with the undeniable fact that photography always comes with an element of luck, of serendipity (yes, even shooting still lifes in a studio).
I don't care if the shutter button got pressed when an amiable dog knocked the camera off a table, if they picture's good, it's good.
If it ahd been a composite, I confess that I would feel a little cheated. With the photograph, there is a sort of social contract that what you see was at any rate pretty much what was in front of the lens unless the photographer says differently. That still doesn't have anything to do with the picture, it's just the way we think about pictures in this here society.