In Naruto, why can't lee use ninjutsu or genjutsu?

kinda self explanatory, maybe i missed something in the show but why can%26#039;t lee use ninjutsu or genjutsu?|||Since a young age, Lee has been unable to mold his chakra due to his underdeveloped chakra coils, leaving him unable to use any ninjutsu or genjutsu.|||i was wondering that too|||his body is only capable of taijutsu, like his thcr..( i dunno the teachr%26#039;s name but in my country his name is %26#039;sir GUY%26#039;, so yeh)