@chu @LyallMorrison @MikeFromLFE @fritzoids i taught self defence for over a decade, and ensured my daughters got their blackbelt too. As someone with numerous blackbelts of my own i can say that the ultimate lesson is not how well you can kick (although that's a pretty cool skill) but what i'd describe as being physically confident in a space. It's situational awareness combined with an understanding of your own body. Dancers often have this btw.
I've broken up or intervened in several violent situations, not because I'm super tough (I'm not), and all without throwing a punch. I've defended myself and a few others by recognising the danger and acting in a way to either defuse or avoid it.
Twenty years of training so that i should never use it. Sounds cliche, i know, but i look at my board breaking, hip throwing daughters walking with confidence and think, yup, they're safer now.