Originally posted by: y4but
i could be wrong, but i don't know if the sole purpose of sharingan is to copy other people's techniques... similar to what's already been said, it's probably grants a huge sense of insight. i think that we haven't really been told a whole lot about what sharingan really does besides that.
i think most people think it's for just copying shit is because kakashi does it really well. i also think that that's just the way he chooses to use it, like, he has an incredible amount of insight on his opponent and just chooses to copy their stuff, hence deeming him the famous copy ninja. i don't think that uchiha was called a copy ninja clan or anything...
anyway i don't know for sure but i think the reason why he doesn't copy a lot is because he doesn't really choose to use it in that sort of way. like i'm sure it's because he's not experienced enough but its probably more than that.
iono watever