I know that you are old enough to remember Johnny Blanchard of the Yankees. He was the best third string catcher/pinch hitter of his day. The Yankees traded him to Kansas City and he cried. One of his teammates urged him to look at the bright side, that he would be starting in KC. Blanchard looked his mate in the face and was still upset and told him that he knew he wasn' t good enough to play everyday. He quickly slipped out of baseball. His Yankeee managers utilized him in a limited fashion giving him his best chance to succeed. He was not a full time player.
Rather than blaming Dusty Baker, maybe it was Baker's utilization of Hanigan that gave him his best opportunity to succeed. If he was the Reds best catcher, he would have played more. Your criticism of baker with relation to hanigan is baseless. He is a part time player, and the first season that he was separated from Baker was his worst season. He is a backup -- a good one-- but nothing more than a backup.