Mokuton is significantly more versatile than Jinton and encompasses a significantly larger area than Jinton does. Jinton is primarily known and even feared for its destructive capability, but even that pales in comparison to Hashirama's Flower Tree World that bypasses durability completely and received recognition for that power being a reflection of an omnipotent legend.
if kishi wanted, he could make fire most powerful. Like it burns every element, every thing to nothing. Its upto kishi really. Normal elements are useless now. Till kakazu, it was a thing. Then Naruto got 5-6 Kekkai genkai in a day, and black orb in same day. If mokuton was not Hashiramas tech and it was a tech of a sand village fodder, it wpuld be useless. Only useful to make houses and nothing.
Nope, Amaterasu burns everything and does NOT stop burning. The only times Sasuke's jutsu failed was when most of his opponent were protected by plot shield which is why most trolls keep saying it's weak when it clearly isn't.
Best example ? Raikage and the samurai being saved by Gaara. Itachi already proved that something as thick as a toad wall can be burned in seconds.
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Amaterasu can ignite on objects the size of a bijuu, with the power he has now Sasuke could easily focus a size of that flame and instantly burn anything including chakra.
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In contrast, Jinton is limited and fails against something as large as PS
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Furthermore, what makes Amaterasu superior to Jinton is it's versatility, it can be used in any scenario.
It can be used as a distraction
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It can be used as a surprise attack
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It can be used as an absolute defence
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It can be used with Susanoo
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It can be combined with raiton and other jutsu
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What happens when Sasuke decides to combine these two feats ?
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There's a reason BZ mentioned Amaterasu as the strongest physical attack.
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Jinton = Earth, Wind, Fire
Amaterasu = superior fire that can burn through any of those elements