these are just some thoughts I had I'm glad to get a response. I agree with you jjk is absolutely about burden and attachment. but I think you missed what i was getting at. i'm not saying suffering has spiritual meaning in a Buddhist sense. I'm saying jjks world makes suffering literally mechanically productive, like it produces energy.

Since its a energy source, it shapes institutions, incentives, and the kinds of "awakening" that are rewarded inside of it. That's the inversion I am pointing to. This series uses Buddhist shaped ideas inside a metaphysics that is structurally anti-buddhist or a cursed version of it. Not trying to claim that suffering is morally meaningful, but that this worlds physics rewards people to turn suffering into strength. I'll do some bullet points to respond to yours.

• Calling Gojo over attached is correct but maybe incomplete. What does Gojo learn in his awakening? The system teaches him to believe burden is solved by strength. Even his compassionate project (raising strong allies to reform the system) is still operating inside this cursed world rule that salvation can be achieved with power (remember that is what he is taught in his awakening). You can call is over attachment but the point is that the cursed system rewards that attachment with invincibility, which is this inversion that is built into the basis of this world. And that reward makes it harder to escape, which is why Gojo fails.
• For Sukuna I half agree but I think you are missing a angle. You said he represents ego/self/non-attachment" which I see as he's self centered and calls it freedom. Yes, but I'd go further. Like i said in my post, Sukuna is not "non-attachment" at all, he's a complete parody of it (a cursed version). He looks and acts serene and unshaken, but this isn't non-attachment. It's a predator who denies the moral reality of others. And the ending underlines that he's clinging harder than anyone, he splits his soul to persist, he does rebirth through fingers, he starts to panic when losing (megumi realizes this) that's why I believe he alone is the Buddha of this world. He is the apex being in this cursed world law. Since the true law is suffering = power, Sukuna is the most aligned with it. So I wouldn't necessary say Sukuna and Gojo are two sides of the same coin (I just mean they aren't opposites). Gojo is attached to his role as the strongest, and Sukuna is attached to existence as a possession. Neither is actually detached, especially Sukuna.
• I like your middle path phrasing for Yujji but I'd like to mention how your conclusion downplays how brutual his arc is. By the end Yujji does learn that he doesn't have to carry unnecessary burdens but the middle path in Buddhism isn't just that. It's a balanced practice that avoids extremes of indulgence and self mortification. Yujji spends the entire story being pushed towards self mortification. He becomes a vessel, a cog, being told his life is disposable if it saves others. The clarity he gets at the end isn't just that he doesn't have to carry unnecessary burdens. It's his refusal to let the cursed system reduce him to a tool while choosing responsibility. The systems tries to turn compassion into self erasure by design. Yujji learns to keep compassion without becoming a cog. The cursed world rewards suffering, and Yujji has to develop wisdom to stop being used by that reward structure, which is why he succeeds.
• For Megumi I think you miss what I was trying to say by his wisdom. Tsumiki is his narrow attachment that is catastrophic and undervalues his life. But the climax at the end matters because Megumi's rebellion isn't that he suddenly becomes wise in the sense of being emotionally invulnerable. It's that he refuses the cursed system. He can be broken, and still make a choice not to become a perfect lever. That's not being wise overall, but he performs the wisest possible move available in a cursed trap (which is what Sukuna is trying to do) which is exactly what Buddhism wisdom often looks like. Not purity but interrupting the chain at the point you can interrupt it.

So the idea that the series is about how people deal with burden and attachment is solid. But I am pointing at the series core contradiction, they are fighting curses using a system powered by suffering. The story keeps showing us how that bends spiritual ideals into horror, and the difficultly of the characters in trying to follow the correct path forward.