One of the lessons to be learned is that fighting back is an option that should be given serious consideration. But for some reason the plans are to learn bare handed self-defense rather than get training in commonly available tools specifically designed for engaging an attacker from a distance out of range of edged weapons.
As I learned in knife school, if you get in a knife fight you are going to get cut. Unarmed versus knife and your odds are nearly 100% that you are going to be loosing precious bodily fluids.
Make it your gun versus their knife and your odds of requiring stitches or a coffin go way down.
Firearms instructors in the area should be offering their services to these women.
[H/T to Mike for the email pointer.]