It's a three-part reasoning.
Uzuhiko > Boruto
- Boruto states it's above his normal AP if he doesn't hold it back.
Uzuhiko's Maximum Output = Centrifugal Force and Rotation of the Planet
tbh this whole section is a small part of my bigger argument that Uzuhiko is a jutsu that moves the planet's chakra toward a target rather than siphoning it into Boruto's chakra pool for an attack.
- Bort hasn't shown the ability to amp his stats with Uzuhiko's vast energy, nor can he leave the ground until the jutsu makes contact with its target, something that is in direct contrast to every absorption ability in the series where the power is yours to manipulate once it reaches you.
- Boruto claims to hold back Uzuhiko's power on more limited uses (for example: Code, who received far less damage and got hit with a far less visually powerful version of Uzuhiko, not to mention Bort was actively trying to let Code live, and get information on where the Juubi was out of him.)
- The Planet shakes when Uzuhiko is active which wouldn't happen if it was just siphoning rotation from the earth (even if one were to say this is an appeal to reality, Ikemoto chose to actively utilize real-world scientific principles in the mechanics of the jutsu to depict where it's large power is coming from, disregarding that would be far more assumptive than simply taking the words verbatim.)
- Boruto refers to Uzuhiko as a counterattack from the planet he attempted to destroy. (which isn't really evidence but very on-brand for the bigger picture)
Narrative Stuff (I know gross)
- Bort is the narrative contrast to Kawaki and Code who embrace their Otsutsuki traits and abilities to further their desires. whereas a majority of the Boruto series has been about Boruto, someone in a reverse situation to Naruto, learning to embrace the Shinobi ideology of enduring hardship for what they believe in/desire. The Otsutsuki Way is a direct contrast to the Shinobi way that Naruto has been preaching to the new generation (Self-Indulgence vs Self-Improvement, Self-Serving Oppression vs Desired Co-Existence, desire for Longevity/Immortality vs a desire to improve the current state of the world for the next generation, etc.) so for Boruto's main jutsu to be a way to redirect and tether the energy of the planet to an opponent, provide an outlet for the planet to attack its oppressors, the direct opposite of Otsutsuki, who snatch all of the life force on a planet disregarding the will of any other living being their let along the planet, is pretty thematically on point with what Ike and Kishi have been pushing since Boruto: Naruto the Movie, not to mention Kishi has been giving thematic relevance to important character's jutsu since chapter 1 of Naruto.
So Basically
If one were to accept that:
- Maximum Output Uzuhiko is the full rotational energy of a planet and not its suppressed variants.
- That it's stronger than TS characters who are massively stronger than Jigen, who is stronger than Shippuden GTs.
- And that all the Statements in the manga/databook, along with the narrative and thematic relevance the jutsu represents is logically sound.
Then it makes higher metas a lot less justifiable,
(specifically talking Tier 4 and up, I don't think Kishi knows the amount of Zettatons the Earth's rotation yields, if series somehow, someway gets a 5A calc in the future by an Uzuhiko victim, I don't think Uzuhiko negs that calc from being usable, but if someone said The Last Naruto punches with the force of 15 trillion stars when Uzuhiko is powered by a very quantifiable amount of energy from a single planet, ppl have every right to be skeptical.)
