Flawed logic mate their power is split between the two sons of the sage.
Of course it does that's why Naruto plays no part in it.
As for inheriting something from Naruto, appearance why else is he referred to as clone? Ontop of that man refers to mankind it's a shorter form.
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-It isn't an asspull. That's like calling sharingan's abilities or kurama asspulls. They pertain to the plot heavily and have reasons on why they exist.
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Not everything has a foreshadow.[/QUOTE]
Not really conpareable as the Sharingan's abilities or Kurama's. They didn't pop out of thin air and were explored.
You're right when the MC isn't involved a foreshadow isn't required or necessary. With main characters though it's a different story altogether and if not foteshadowed it's ass pulled.