ok, so basicly what you are saying is that the saringan ca nread minds which it cant. jutsus arent just seals and chakra amount, if they can see these 2 they still need to figure out the last part of the jutsu how does it work? if they got the knowledge they can copy jutsus but if they dont they cant. as to why he would think the chidori is better 1) its based on the sharingan, you cant use it without it. 2) its his own jutsu. 3) a man has pride enough to do so. 4) the show would be boring if everyone used the same jutsu all the time.