Rule against hitting the groin or gouging someone’s eyes. There are lots of combat styles that are more efficient than Jiu-Jitsu, but they’re not for competing, they’re for survival.

I used to train some of the less savoury martial arts, and ever so often we had people from the Jiu-Jitsu class wanting to train with us because they saw us doing “wrong things” and wanted to “teach us”. What they discovered very quickly is that lots of Jiu-Jitsu positions put you in a very vulnerable spot if your opponent knows and can use pressure points, including groin and eyes, and that the “wrong” things we were doing might open a counter attack but prevented those things.

I’m not saying BJJ is bad, but it’s not the br all end all that people claim it to be.