Hmm you have an interesting interpretation of that scene . I didn't really look at it that way. I never really saw or felt the woman empowerment motif was being thrown at us even with the speech. I felt it was more of a pity thing. From previous episodes we know the hound is weak and is sick. We also know from previous episodes that Bree is big as shyt and is an anomaly of a woman. It wasn't unrealistic for her to beat The hound at all.
Yes it is definitely realistic for her to beat a weak and sick hound. My argument is about how they made it seem like he was 100%.