Here's why:

* Reflection requires a smooth surface: The Moon's surface is very rough and uneven, covered in craters, mountains, and dust. This means any light reflecting off the Moon will be scattered in many directions, not forming a clear image.

* Distance and light: The Earth is quite far away from the Moon, and the amount of light reflecting off the Earth is not strong enough to project a visible image onto the Moon's surface.

* No projector: There's no giant "projector" in space beaming Earth's maps onto the Moon.

While we can see the Earth from the Moon, it appears as a bright blue-white disc in the sky, not a detailed map.