The second statement does not logically infer from the first.
Considering probability, the sheer size of the Universe dictates that the chance of life existing only on a single planet be very small
Therefore if it was proven that life only existed on one world (others have pointed out how difficult this would be) then it just shows that the probability of life existing on a planet is
really small, since it only occured once. One cannot infer a divine being from it.
By the way, I don't think your two statements are 'laws' but that's a minor nitpick.