When it comes to the topic of Mangekyou Sharingan in Naruto Shippuden, we all know that the user of this technique will eventually go blind and even get blind if they use the technique too often. However, there is a way to overcome this by transplanting another Mangekyou into the user’s eyes, making their eyes Eternal Mangekyou Sharingan which will not cause blindness. But why didn’t Itachi take Fugaku’s Mangekyou to make his into an Eternal Mangekyou Sharingan? Here are some potential reasons:
1. Itachi Was Not After Power
Itachi Uchiha was not the type of person who was after power and strength. His goal was to protect his little brother Sasuke and the village. He lied to Sasuke, saying that he wanted his eyes to become an Eternal Mangekyou Sharingan, so that Sasuke would take his eyes after Itachi’s death, thus gaining the Eternal Mangekyou. This was not for Itachi’s benefit, but for Sasuke’s. Therefore, since Itachi did not desire power, he had no reason to take Fugaku’s eyes.
2. Taking Fugaku’s Eyes Was Not Part of Itachi’s Mission
Itachi had two missions: to prevent a coup d’etat by eliminating his clan, and to protect Sasuke. After he fulfilled his missions, especially by killing his family, including his parents, his main goal was achieved. Therefore, it was unnecessary for him to take his father’s eyes to make his Mangekyou Sharingan an Eternal one.
3. Itachi Was Not Evil
Itachi did not kill his clan and parents because he was evil. He did it because he was forced to do so to prevent a larger and more dangerous conflict. He even shed tears when he killed his parents because he knew it would not be easy. Therefore, it was not ethical for him to take Fugaku’s eyes after killing him.
In conclusion, Itachi Uchiha did not take Fugaku’s eyes to make his own Mangekyou Sharingan into an Eternal Mangekyou Sharingan because he did not seek power, it was not part of his missions and it was not ethical for him to do so. Itachi was a complex character with his own philosophy and principles. His actions were selfless and to protect others.