User blog comment:Godisme/San'ou/@comment-44061-20120725184708/@comment-5332138-20120726075500

The fear thing messed with Byakuya's mind. No matter how much he wanted to rationalize it, he couldn't so his fighting was impaired. Byakuya is pretty weak without his Bankai, to be honest.

You also need to remember that the Quincy can very easily absorb kido. Using something like that is beyond useless against them.