Jesus told the disciples that the man had been born blind, not because of sin. They needed to get their focus off of blaming people and onto the glory of God working through people. God would be revealed to people because of the healing of this man (John 9:1-3).
I am not sure why we are driven to find the reason for everything. Curiosity is not evil, but pointing fingers is. Why not look for God even in the difficult circumstances.
