Board Thread:General Discussion/@comment-39156026-20190425022331/@comment-29325824-20200120105050

Do you really think Unohana would care what anyone else thinks? Not to mention it is what she herself desired above all else.

Besides, it's a point that not only was it something Unohana herself wanted (something which Isane understood, despite possibly being in love with Unohana), but it shows how desperate the Gotei 13 were. Willing to give up their best healer for just greater attack strength.