Why Kakashi Can’t Turn Off Sharingan?

Kakashi cannot deactivate his Sharingan because it was a gift from Obito Uchiha, and only an Uchiha can turn the Sharingan on or off. The Uchiha have a specific gene that allows them to use, activate, and deactivate their Sharingan at will. Not only is Kakashi Hatake not an Uchiha, but the eye also did not belong to him as Obito Uchiha gifted it for becoming a Jonin. Kakashi’s strength is still great, and he can support his eye for an extended period. Despite this, he cannot turn off his Sharingan because his chakra will completely reset to zero.