I find it a valuable quote, and yet it saddens me, because how many of us were taught as children, for 18 years at least, and even into adulthood, that we were always wrong, always the ones at fault; how many of us grew up knowing we had little choice but to shut up in the face of a more powerful person's anger?
Mostly--I think many of us were told so often that we were WRONG and DESERVED to have this anger launched at us, that it's a very difficult lesson to unlearn, very difficult to start that process of taking a chance that maybe, finally, we really ARE right about something, and maybe, we really DO deserve better than this.
Your story, though, tells the world we can do it.
Good for you for pulling her aside and talking to her!