saplesam - In my opinion you are indeed simplifying a complex situation.
It is easy for anyone with the strength of character to deal with this behaviour to wonder why everyone else does not do the same.
The fact is, we are all different, and those without a voice, or the means to defend themselves need our help and support.
I have not read what Ms. Robinson has said, but from her media profile, I am willing to imagine that it something along the lines of "In my day you gave a man a slap and told him to grow up ..." which is fine, if you are like Ms. Robinson, a woman with a reputation for being strong and able to defend herself.
Sadly, a lot of other women, and indeed men, are not that lucky, and expecting everyone to act the way we do in a situation is not only lacking empathy and support, it fosters a climate where people behave badly because they think that, not being told they are wrong is the same as being told they are right.