It's kinda like rock-paper-scissors.
Think of rock as Naruto, scissors as Otsutsuki and paper as a planet.
Rock wins against scissors (which defeats paper), but that does not mean they also win against paper.
Naruto can, yes, win against Otsutsuki (who can blow planets up), but that doesn't mean he can, too, destroy planets.
If it were an Uchiha with a special ability that explanation would make sense. As Naruto has no serious hacks, this logic would be extremely flawed. Honestly I’m not sure where you came up with that, it doesn’t make sense. Explain?
Also, you called them planet busters, but draining the life from a planet via a god tree is not planet busting. Only Kaguya herself with her Expansive Truth Seeking Ball has the ability to destroy a planet and without that she can't. Only source we are given for adult Naruto's power is the power to destroy half a continent. Yamcha is at Earth level destruction bare minimum and considering he survived Beerus and Champas energy clash which put him on the ground and knocked him out I would say he has definitely gotten much stronger than Saiyan Saga Vegeta.
We are assuming that Yamcha is able to defeat Recoome as that is the highest guaranteed level of power he has, though it was filler only. He is indeed a planet buster.
Life draining was never a feat listed for planet busting, Hagoromo never drained life from a planet. Madara’s strength also did not come from planet draining but becoming the ten tails Jinchūriki.
Also someone told you Kaguya’s Final Truth Orb was planet level. That someone also lied.
Databook says it would have destroyed the planet they were on if she actually managed to use it, hence in the chapter Kakashi says using Kamui to hide would have been useless because they would have nothing to come back to if she succeeded anyway
I’d take the actual manga over the data books. I’m not sure if they said planet specifically or what, but in the actual manga Black Zetsu says:
“An expansive Kekkei Moura Truth Orb that contains each nature.” “It’s the start of a new time space and you will be it’s sacrifices.”
Attached is the manga image.
Sounds like her ball is dimension level, but Kaguya isn’t really what we’re discussing here.
Kaguya is by far the strongest single entity in Naruto as of yet, and I think Jigen MAY be the only one who is either as strong or stronger than her.. we will see. Kaguya cannot be killed by the people in the Naruto world, she can only be sealed and ONLY the Six Paths Chibaku Tensei can do it. But again Somebody who is actually planet destruction level like Yamcha should be able to completely erase her, and if he can do that to her than he can do that to Naruto easy.