I grew up in a steel town with a history of pro fighters of stature. It was not uncommon for 'trained' smaller fighters to come to grief by taking on a larger man in a street fight.
I personally witnessed brown and black belted females in tae kwon do look like children in the hands of bigger, stronger blue and green belts.
There ain't no substitute for size, strength, speed and aggression.
Hollywood has done a great job of pushing the fantasy of the Victoria Secret model in heels kicking the shite out of ex-Russian special forces because she was trained in the sweet science.
Teach your wives and daughter to throw a straight punch and hard kick as a means to stun, then escape.