I’ve trained in lots of martial arts, this is one of those catch phrases people like to throw around a lot there, but it’s only true if you normalize for strength.

I remember a long while back my SiL went to some BJJ classes, and she was going on and on about how it was great because with those techniques strength didn’t mattered and she was learning how to defend herself against much more strong opponents. I told her something among the lines of “that’s great and all, but don’t get overconfident, BJJ only works if the opponent is in a similar weight category, a kick to the nuts is a lot more effective in real life”, she didn’t believe me, so I asked her to get me in something she had learned, she went for an arm lock, I ensured she had grabbed me correctly and then I stood up carrying her up with me. Yeah, BJJ is great and everyone should learn a little bit, but technique doesn’t matter for shit if your opponent can lift you with one arm. Also no, I’m not superman, my SiL is very petite.