[And now Karen will attempt the greatest lie of omission she's ever told. Can she out-Kyuubey Kyuubey?]
I believe you and the others have been misled about the relationship between witches and magical girls. Magical girls aren't created because witches are present; rather, witches are created because magical girls are present. The negative side of your power, so to speak.
With that information, it all becomes clear. Suppose it's true that witches appear when magical girls are present. Suppose further that Kaname-san is to become not just a powerful magical girl, but the most powerful magical girl in the world. If that's the case, then it stands to reason that, if she falls, she'll leave behind a witch nobody else is capable of defeating.
[Locked]
I believe you and the others have been misled about the relationship between witches and magical girls. Magical girls aren't created because witches are present; rather, witches are created because magical girls are present. The negative side of your power, so to speak.
With that information, it all becomes clear. Suppose it's true that witches appear when magical girls are present. Suppose further that Kaname-san is to become not just a powerful magical girl, but the most powerful magical girl in the world. If that's the case, then it stands to reason that, if she falls, she'll leave behind a witch nobody else is capable of defeating.