Similarly, God did not send us challenged children. Somewhere, somehow, our genes didn't mix appropriately, or an umbilical cord got wrapped around the neck, or . . . It just happened. Jesus dealt with this when some of his followers asked him about Pilate's deed of killing some Jewish worshipers in the temple. His point being, the Galileans were killed because of the deeds of an evil man, and the tower fell because of the laws of gravity and perhaps from a design fault.
Life is difficult.
And when life was difficult for the Israelites and the early Christians, they turned to the psalms. Psalm 88 is most appropriate when we're struggling, as is Psalm 77. Truly, those who care for these whom society has deemed the least, they shall be, and already are, the greatest.