Board Thread:Off Topic/@comment-25396609-20151125184514/@comment-26397825-20151202080614

Well, the concussive force from said sword or bullet would daze you, plus the ringing in your ears. I don't think you realise how loud a blow to the head is when you are wearing a helm that covers your ears. It rings, and the force of blows, though it may not cut or crack your skull, is still enough to leave you dazed. Plus, that force is transmitted through your skull and to your neck, which can leads to problems down the line; the neck is a surprisingly fragile thing.

You can argue that aura will protect you, but I can argue that the enemy who's blade you are blocking will have aura to enhance their blow as well. It really kind of negates itself and makes this not a viable fighting style. The head is too vulnerable a part of the body to effectively use it for the basis of your fighting style.