2) hachigen knows she does something very different from healing.
bach also mentions that she could have fixed yama's arm and they knew that. clearly putting her in a category separate from, or at least above normal healing.
she explicitly stated she could have fixed her own if there were pieces left. it's not unreasonable to think she could do it for others, especially given she can revive the dead.We have no reason to believe she could have restored Ichigo's powers. Maybe she tried and it didn't work? We don't know if she can heal Bankai's or not. We do know that she's never had any reason to try. Is Ikkaku even aware of her abilities? Why would he go ask a complete stranger to heal his Bankai, when he keeps it a secret from his closest friends?
then we should know that
not because he said anything, but because he went through the trouble of kidnapping her, using his 4th most powerful soldier to babysit her, and that she can apparently fix what is to date the most powerful object in the entire series.How do we even know that she's as powerful as you all think she is? Because Aizen said so? Cause he's totally a reliable source of information and has never deceived anyone before?