In a self-defense scenario, use of force has to be reasonable and proportionate to the level of threat present or else a trained practitioner of jiu-jitsu (or any martial art) will be legally at risk of excessive force and subject to charges. If we know how to apply submissions, we also definitely need to know how to apply control and subdue an attacker in a street fight scenario without causing permanent life-altering damage to another human being.
In a self-defense scenario, use of force has to be reasonable and proportionate to the level of threat present or else a trained practitioner of jiu-jitsu (or any martial art) will be legally at risk of excessive force and subject to charges. If we know how to apply submissions, we also definitely need to know how to apply control and subdue an attacker in a street fight scenario without causing permanent life-altering damage to another human being.
We All know what happened to Leandro Lo once he let the guy go.