Well if you saw it you would know that Gaff tried to hit him in the chest. Not excusing it, but it is probably helpful to state facts. You have like myself probably seen the incident replayed many times and would have seen Brayshaw lower slightly, meaning at the time the punch connected, his head was at the position his chest was just before. Look at Gaff’s arm and fist at contact
Given that and Gaffs history and comments after, it is open to believe that Gaff never intended to hit him in the mouth.
I don’t think he intended what happened, but it is what it is.
He deserved hi penalty.