The talent says, "Brace himself". Common sense speaks what this means - bracing yourself against some sort of environmental affect hindering YOU. It's easy to imagine bracing yourself against a strong wind, zero gravity, etc. in order to prepare for an action of some sort. But I can't imagine how bracing myself could help me negate the cover someone else is hiding behind. That cover your target is behind isn't physically affecting you at all, so holding myself more strongly in place has no affect upon it. That's non-sensical.
We shouldn't be getting so literal with reading of the rules when the common sense interpretation is already so obvious.
I don't know, "bracing yourself" when shooting a rifle to get a more accurate shot? Seems legit to me. Maybe your common sense and my common sense aren't ...common?
...Common...surable?
(That pun is terrible. Apologies.)