Actually it fits the narrative perfectly. People are free to disagree of course, but I think its quite telling that you have a woman with 15 years of martial arts experience needing help from a passerby. On the other hand, you have women who choked out violent offenders without help from anyone.
What was the difference maker? Well you have women on one side depending on brute force, and you have women on the other side relying on various other factors.
Remember this vid?
Two supposedly equal martial artists sparring for a black belt test. The woman couldn't compete because she couldn't match the sheer power of her male opponent, and it got to the point where the guy just fought her with his hands down. And this is what happened to that girl in Australia. Despite her karate training, her blows simply weren't getting the job done. We should recognize that, and accept that, and teach women accordingly, instead of giving them some sort of fantasy that they're going to be able to stop that big burly killer with spinning kicks or knife-hand attacks.
Political correctness can be a killer.