There is no sadness because of separation, no joy because of new acquaintances.
If someone had accompanied Itachi on the way forward, maybe Itachi would not have chosen to die at the hands of his dearest brother.
If someone guided Sasuke, would the child not have to go through so much pain again?
In fact, the demise of Uchiha is inevitable, but can it also avoid the fate of brothers killing each other?
The road is tortuous, but the future is bright.
See how another Uchiha girl used her own efforts to make Itachi happy and Sasuke free from pain.
Finally, he and Itachi lived a happy life.