you're still not understanding it. sharingan allows the user to see and react to all types of jutsus/movements instantly which makes the chidori user to go in for a direct attack while still being able to dodge any incoming counter-attacks and still continue with the chidori. byukagan doesn't have that capability since it doesn't allow the user to immediately read and react to opponents' moves.Originally posted by: polaris79
I don't think this is true.
In addition to scope of perception (giving a larger sight field), the byukagan also gives sharpness of sight. Recall how during the Chuninn exams, when Neji was facing Hinata, he was able to see her slightest facial expressions.
Also, before the fighting stage of the Chuninn exams, during the forest stage, Hinanta was asked by Kiba to scout the forest for eneimes. With the byukagan, she was able to see far distances.