Since Rusty and Kingofwolves have graciously provided the reasonings behind the High End scaling, I'm instead going to address the main arguments from the opposition.
Shock Absorption
This whole braindead USJ Nomu debate came from people using the Shock Absorption Quirk argument which is a
strawman.
- Our wiki profiles never scaled the High Ends/Near High Ends to the Shock Absorption Quirk. Anyone can check the USJ Nomu's profiles and Hood's profiles and they have their own, separate justifications.
- The Shock Absorption Quirk did not allow the USJ Nomu to reach All Might levels of durability. It allowed the USJ Nomu to no sell All Might's attacks, to the point that All Might needed to go beyond his 100% to overpower it. USJ Nomu's durability was, effectively, above All Might's own attack power (and durability).
- Ergo, the USJ Nomu, at its base, was already made to be as powerful as All Might. That's where the High Ends scale from.
Kamino Incident
Some people love to cite this event when evidences of other characters scaling is present
in this very event.
- We see Endeavor cancel out All For One's Air Cannon.
- We see Edgeshot attack All For One, and All For One dodges.
Does this mean Endeavor and Edgeshot, on their own, can defeat All For One?
NO.
Does this mean Endeavor and Edgeshot are portrayed to be capable of harming All For One and/or matching his AP?
YES. That's why they scale.
Obviously, All For One has the edge on raw power and versatility. We saw him overpower the heroes with a large scale Air Cannon. That's not a counterargument to the scaling at all though, so I'm not sure why some people think it is.
- We know that Endeavor is weaker and slower than Hood, a High End that scales to the USJ Nomu.
- But we know that Endeavor is not that far behind Hood, and he was able to react to High End level attacks and harm High End level characters.
- We know of Endeavor's feats while fighting Shigaraki, someone who is compared to All Might and is superior to All For One, at least during Kamino events.
- We know that Endeavor and Hawks were a threat to All For One. AFO was superior to them, and AFO was nerfed, but so was Hawks and Endeavor was not only not at 100%, but All For One also relied on mind games to catch Endeavor off guard.
I'm actually convinced that some people here are confused that "scaling" means
Character A beats Character B, when we're really talking about
Character A can punch as hard as, or can hurt, Character B.
Extra Thoughts
I've actually been meaning to ask...
To those who are against the High End scaling,
where exactly would you place the High Ends at?
Let's just say that this interpretation is actually agreed on by everybody. I'm just curious.