The thing is that even if he meant something else, what he said doesn't reflect much sensitivity for the reality that women are constantly blamed for being targets of harassment, assault and other abuse. And being blamed and held responsible for something like that can be very traumatic, especially if the person doing the blaming is in a position of so much power (like a T).
Let's say in the best of all worlds Twoper's T was merely trying to say that he wants to help her work on her assertiveness skills. He needs to preface that with some statement showing that he has an awareness of and sensitivity to the realities of victim blaming and clarify that his intention is to help her cope better should she encounter harassment in the future. And that he holds the perpetrators responsible for whatever harassment or abuse she has suffered.
Twoper I think you deserve a therapist who gets gender-based violence and doesn't further blame, shame or victimize you. If, in bringing this up with your T he is able to give you ample assurance that he gets you, cares deeply about not blaming and shaming victims and you feel satisfied with that then great. If not, I'm sure it would be possible to find a T who can.