Nue: In Shippuden we learned that if someone absorbs nature energy
Nue: incorrectly or overdo then it would turn them into a stone toad. This was shown during the
Pain attack arch when one of the paths of pain attempts to absorb Naruto’s chakra while
Naruto was in sage mode, this results in the pain turning into a stone toad.
So if Nue was to absorb Uzumaki Naruto Chakra while Naruto himself was in sage mode,
then surely Nue would turn into a stone toad. So Naruto could have to stop Nue by just
letting Nue absorb his sage Chakra turning Nue into a stone toad.
In fiction, plot error is a gap or incompatibility in a storyline that goes against the flow of
logic established by the naruto Shippuden story.
For example: it would be a plot hole if, for whatever reason, the upper-level ninja in
Hidden Leaf were unaware or uninvolve in this crisis and didn’t try to resolve it, but they
did Uzumaki Naruto himself actively attempting to resolve it when Nue appeared.
In this case, Uzumaki Naruto activates his Nine-Tails Chakra Mode, not sage mode, in order
to attack Nue, and was warn not to because it might absorb his chakra and grow bigger
and explode. This is sound logic.
and Even assuming naruto thought of using the Sage mode to attack, let’s look at the
logistics of that. Sage mode has to hold still to create sage chakra. In regards to Pain, he
had Uzumaki Naruto in a headlock and absorb his chakra. Naruto used this to his
advantage to feed the sage chakra that caused it to become a stone toad.
Nue aborbed chakra by eating and attacking people and was the size of several
buses stack on top of each other.
Needless to say, only the hold still and let it overeat is not a sound method of
combating that, and attacking it clearly in sage mode Chakra would not guarantee
either being able to do enough damage or feed it enough sage chakra to make
stone toad. The long and short of it is, Uzumaki Naruto’s vast power and ability
was actually a detriment to him in this case as it also made him a huge liability if
Nue managed to absorb his chakra.