If obedience to law was the point, then we could just as easily have been created as inanimate objects, no free will and would obey the laws of nature to the letter -- no exceptions. Inanimate objects however, can not know itself, others and the creator himself -- hence incapable of accepting and offering love. Only with free will can one accept and offer love.
As I have often said, evil has no independent existence. It is a corrupted love.