Or, he was against releasing, but was overridden (by Cook perhaps), then refused to apologise because it wasn't his mistake...
The reality is, we don't, and probably won't know. Seems strange though, that Forestall did exceptionally good releases [1] up until iOS 6 and then all of a sudden he just dropped the ball with maps...
[1] Excluding the fact that new iOSes generally suck for older iPhones, and force a hardware upgrade.