Board Thread:Theories and Speculation/@comment-26119997-20150219181955/@comment-24593592-20150220164149

LegionZero wrote:

Absolute power corrupts absolutely. All that happened was she let the power go to her head.

No, it's implied that the fruit messed with her mental state somehow. She randomly turned on her children after loving them for many years. There was clearly something wrong with her.

We have also seen merging with the tree makes you stronger.

No it doesn't. Hagoromo said that Kaguya was stronger than anyone and didn't even know she was the Juubi. So Kaguya did not get stronger by merging with the tree, but weaker.