No one said the computer running the simulation used digital logic. If we could encode system dynamics into "energy+matter", you could call it an analog computer without much dissent. People do this in miniature: in fact, the first computers were entirely mechanical!

If we accept this reasoning to imply that the universe is a giant computer, we only have the unknowable left: was it purposefully (intelligently) designed or did it spontaneously arise? As far as I can tell, the probability of either outcome is equal according to our limited experiences, and we will never have access to a definitive answer one way or the other.