The folowing scenario isn’t as far fetched as you may think.
Imagine that you and a group of other photographers were standing next to each other and were photographing the same thing.
You all had DSLR cameras. You all had your cameras set to the same auto-exposure mode and you all pressed your shutter at the same time.
Except for a little variance in framing, you all basically get the same photograph.
Now imagine that everyone except you were using the same auto-exposure mode. You were using the manual exposure mode on your camera.
Because you were a thoughtful photographer and picked your aperture, shutter speed and ISO based on what you wanted as a composition that you had in mind, you have made a picture that is unique.
The difference is you MADE the picture relying on your imagination and understanding of the craft while the others GOT whatever the camera gave them.