I couldn't believe my eyes seeing this advice to teach young boys to hit girls so as to restore the boys' self esteem and pride.
This is the kind of toxic belief that shouldn't be allowed to proliferate here and yet is embraced with open arms by other users.
That boys can only regain their pride and self esteem by hitting girls leads directly to more violence against women and girls.
Knowing how, and using it aggressively are very different things.
It's cliche, but people often become what they wanted/needed growing up. If you leave someone powerless, they often try and claw back some power, often in a similar way to what they suffered. Someone who is hit by someone they love will often lash out in the same way against others including those they "love". The school bully is/was often the victim of bullying elsewhere.
Knowing how to use force to defend yourself, and using it to get your way are 2 VERY different things, mentally. Martial arts etc also teach a centering of thought. You're not lashing out with emotion. You're methodically stopping a situation that is unacceptable.