I think if the machine was two dimensional and the photo had a measurement scale then it would be as good as a blueprint.

The machine is not, and neither is the world. Even if it were, it would still not be as good. It would not tell you about materials, tolerances, or many other important things.

It isn't a requirement for a map to capture all characteristics of an area to be considered a map.

That does not mean you can just leave out anything you want, though.

No, many aspects are not captured by a picture. E.g. borders.