For Ronda Rousey , fighting with anger or any other emotion can be a detriment to your ability to succeed. It comes to minimizing errors because the slightest mistake can lead to a humongous window of opportunity for your opponents, especially in a game of centimeters that is mixed martial arts. One mistake and the fight could be over. That's what makes mixed martial arts unique vis-à-vis other sports; that one technique finish. If somebody jumps over their opponents head and dunks on them in an NBA game in the first minute of competition, that's great but there's still 47 minutes of basketball left. If you get knocked out in a mixed martial arts fight in the first minute of action, the referee isn't going to wake you up, dust you off, and then send you off to finish the next 14 minutes of fighting. It's over. So staying calm and emotion-free can be a healthy attitude to take to minimize errors, and that's what Ronda Rousey strives to do in competition:
If you're fighting with emotion instead of structure, then it's always going to be a mistake.