In general, the Otsutsuki story has a lot of misinformation that's paraded around like it's truth, even in the series.
How I see it, it goes like this-
- Kaguya arrives on Earth with Isshiki.
- Kaguya was supposed to plant a Karma on one of the humans and be used to make the Juubi become a God Tree.
- However, she didn't do this and instead fused with the Juubi how it was and backstabbed Isshiki or betrayed him and then merged with Juubi. It doesn't matter how it happens to cause his guard was down anyway.
- Befriended and loved humanity and had children.
- Started to fear for her life as she knew Momoshiki and Kinshiki would descend on her eventually.
- She then created a "God Tree," as Obito did in the war. [1][2][3][4][5][6]
- Used IT and the Tree roots to trap humanity to create white Zetsu to stand a chance at fighting Momoshiki and Kinshiki. [1][2][3][4]
- She lost control of herself and turned into a mindless beast, Juubi. [1][2]
- Hagoromo and Hamura went on to seal her in that unstable form, and the rest is history.
There's no such thing as "Pre Fruit Kaguya" cause there can't be a fruit in the first place. There was no
living Otsutsuki sacrifice to make the Juubi a God Tree, and the planet is still very much alive, so it and its inhabitants weren't drained by a God Tree.
The only people who claim she ate a fruit didn't know the Trees mechanics nor were there to see the event. In fact, most of the information comes from Black Zetsu, whose main goal was to misinform people into reviving Kaguya.
Another point is that the only time we see people with such control over the God Tree's roots, they absorbed the Juubi into themselves, i.e., Juubito, Juubidara, and Kaguya.