> Do they truely have no liability?
Liability in being the victim of harassment?
> Why is it impossible to consider the possibility of some women using sex to get ahead?
It's not impossible to consider this, but this isn't what is being discussed.
> and continued association is not only a mixed message,
And again you keep missing the point. Continued associated is a result of a business relationship. That's exactly the point. By continuing a professional relationship with someone does not mean you are consenting to further sexual advances that you've already declined.
> whom we paint (unfairly and innacurately) as defensless
Again noone is painting anyone as defenseless. You're view of this entire picture is skewed. It is about being placed in situations that people shouldn't have to be placed it. Or make decisions they shouldn't have to make. That doesn't make anyone defenseless. Victims of sexual harassment (whether men or women) have agency in life, it's just situations that they shouldn't be put in.