User blog comment:IamJakuhoRaikoben/Chapter 330: Zirconis' Magic, Review./@comment-5580383-20130512144800/@comment-7418318-20130512145913

I think you are too stuck on "outside of story" view in regards to Ichigo. Sure we all know it will most likely be Ichigo who defeats him (unless the author pulls Aizen from prison), but for the Shinigami to trust everything to Ichigo would just be reckless.

With the powers he used against Aizen, he couldn't defeat Bach and he's even weaker now than he was back then (not to mention even the hight of his powers weren't enough to defeat Aizen by himself, only enough to allow Uruharas trap to trigger). Also the Shinigami don't know about Ichigos Quincy legacy and they probably know only little about his hollow transformation.

They have no reason to believe that Ichigo can defeat Bach, so they need another option.

I wholeheartedly agree with you that it was stupid that Unohana had to die to awaken Zaraki. But if for some retarded reason it really is the only way to awaken him, then in-story it makes sense for the acting captain general to make that decision, even though it is horrible writing for us readers.

In other words I don't blame any of the in-story characters. It's all the writers fault!