I think the op must have been confused by the inverse square law for omnidirectional wireless transmission.

https://en.wikipedia.org/wiki/Inverse-square_law

This is where you picture an expanding wireless sphere of transmission from a point source and since the surface area of this sphere grows by the square of the distance you get this "power attenuates by the square of the distance" rule.

This of course doesn't apply to power over a 2D cable.