User blog comment:TheNewProtagonist/Vol. 2 Episode 1 - I just.... why?/@comment-4010415-20140727041746/@comment-2006510-20140727164425

Well TheNewProtagonist, Aura CAN be used to block damage among many other things, whenever it's consciously or unconsciously activated - so as long as they have Aura, they can handle things like that

And since they probably began the fight with full Aura, it wasn't a problem. If it was right after a massive other fight, then you'd have a point.

Also, Semblance is the specialized unique aspect of people's Aura; Aura itself is a general force. That was kinda intentional, imo