If you are scientifically-minded, I think you should consider how the second law of thermodynamics makes problems for your hope/assumption that AI can generate with equiprobability both good and bad outcomes.

If you are monotheistically-minded, consider "Satan's ratchet": It's always easier to lie, kill and destroy than to disseminate truth, raise something from the dead, and build.

P.S. I just made up this bit about Satan's ratchet but I think it has a nice ring to it.