The domain expansion wasn’t meant to serve as a showstopper move like Sukuna’s or Gojo’s because making it do so would give into Sukuna’s ideology that “The strongest do what they want while the weak have to deal with it.” It would just turn Yuji into another Gojo: just another incredibly strong cog. However, making this Domain: the pinnacle of Jujutsu, focus more upon preserving life than taking it away, and putting more focus on Megumi and Nobara’s help shows that Sukuna’s mentality was fatally flawed, and couldn’t stand up to lives well lived.
