What you are pointing out is the degree of how much of a fall the fall was when man decided to not take orders from God concerning his education and knowledge. Now we need to be saved from sin and death. Each child born blind has been given life by the life giver, but can't be blamed for the results of sin. I mean, yeah, He is blamed everyday, but it is out of ignorance of Him and the love He claims to be. His reason for allowing such things and createing such things may be higher than our understanding.
I see where your at. I've asked the same questions as most do, but after a while you just have faith on what needs to be taken care of by God. God doesn't really hide the fact that He created good and evil.
Isaiah 45:7 I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things.
Psalms 75:7 But God is the judge: he putteth down one, and setteth up another.
Exodus 4:11 And the LORD said unto him, Who hath made mans mouth? or who maketh the dumb, or deaf, or the seeing, or the blind? have not I the LORD?
John 9:1 ¶ And as Jesus passed by, he saw a man which was blind from his birth.
2 And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind?
3 Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him.
God has purpose and glory to be revealed in the end. All things will work together for good to those that love God, and are the called according to His purpose. (Rom. 8:28)