Every martial art and fighting sport such as MMA all have rules but street fighters don’t. I will never have to face a black belt outside a dojo because those people aren’t criminals. Black belts routinely get their asses handed to them on the streets. I know: it happened to me and I was a street cop to boot. I’ve seen it over and over again. Dojo training in an open space with a padded floor isn’t where an attack will take place. If someone tries to shoot on me to take me down he will break both patellas on the concrete.