As to creating people knowing they would fail, I liken that to having children. You know they will fail and cause you all kinds of problems, but you do it anyway for the good.
Good?..LoL..Mankind was your g0d's regretful mistake.
Genesis 6:6 "So the Lord was sorry that He had made mankind on the earth, and He was grieved in His heart".
-Bulletproof and Waterproof don't mean Idiotproof.
