Monad said:
Now you bring a complete different matter than them possibly losing one of them in this fight. This and that are two different things.
Basically now you changed the subject and you are asking why she didn't fight Aizen or why wasn't Kenpachi trained by her before when Aizen was doing his party? Well am not Kubo to know exactly why he did what but unlike you guys i have enough imagination and sense to find logical reasons instead of pretending there aren't any that comes to mind.
Kenpachi is a battle fanatic that killed the previous captain to take his place. Even if the rule allows it such actions are very uncommon and disliked. His a scary person with a a scary personality and big scary potential, so is clear SS wasn't all to keen on letting him get his full power if it could be avoided and had such a possible action only as a last resort. Now with even the captain commander dead and their bankais useless or stolen they really are pushed to a corner like never before so that's why it is happening now. SS was very strongly based around the power and figure of captain commander, as long as they had him they always felt they could still handle things.
Unohana at the same time was held in the back of conflicts because she had the key of unlocking that last resort measure.
So when they gathered to go and fight Aizen, first they didn't feel like they were hopeless so to prepare Kenpachi from before and second releasing the power of Kenpachi for Aizen would have been too much of a wasted risk for them since Aizen's power was that full illusion shit that he tricked captains seeing including Kenpachi so they would have released a power they preferred not do for someone that will probably had a way to avoid such power anyway since he already had Kenpachi under his spell.
Unlike Aizen, Kenpachi's power is perfect against this guys that steal bankais since Kenpachi doesn't have to use one.
Don't try to rationalize what isn't there. This is the logic fans of Guilty Crown, SAO and other bad anime/manga use when they encounter plot holes. "What-if's" are irrelevant whan faced with the lackluster writing that makes it neccessary to come up with them in the first place.
Fact is that the Kubo wrote himself into a corner as apparently SS had no problems sending Kenpachi to HM to help Ichigo when they knew Aizen was there.
Also, when the Captain Commando is so powerful and amazing that they didn't feel to unleash kenpachi's potential (which implies that he is stroger than him), why is Kenpachi only interesting in fighting Unohana?
The whole subplot being played out at this specific time is idiotic because there were countless opportunities and other factors that should've played into it, prompting this situation to be resolved before Ichigo even became a Shinigami. But then again, Kubo doesn't want that. He wants to show fights. And he wants to show "badass" characters, no matter how much sense it makes in the story context.
My other main problem is: Powerlevels in Bleach are so inconsistent that Kubo has to come up with excuses and asspulls constantly to keep the SS/Ichigo/[Person X] at a disadvantage to include even more fights that slow down the story development.
The reason? Imho it's because Kubo is a shit writer and doesn't have an idea how to push a story forward most of the time, thus stalling constantly. And this is really getting frutstrating, especially in this arc.
What about Ishida for example? We are nearly 50 chapters into an arc about a Quincy empire waging war against all Shinigami and he is even more irrelevant than ever before so far? Instead, Kubo includes shitty and drawn-out fights to further stall and please fans who onyl want to see their beloved characters. This is very weak and I despise this kind of writing the most.