Reading this article today about a woman and three small children incinerated by the ex-husband, I'm really struck by the contrast between the (Bourke) Maranguka Justice Reinvestment Programme and the "don't look weak" approach propounded in this thread.
Here is further discussion about the programme, which involves strong, consistent community support and intervention. Family violence is down 39%, and DV reoffending in over-26s down by nearly half.
So yes, a lot of violence can be prevented. But not by telling women to stop looking weak.
More
here and
here.