The “purpose” of most martial arts is to defeat other martial artists of roughly the same skill level, within the rules of the given martial art.
Not only skill level, but usually physical capability level (as proxied by weight and sex) as well. As an aside, although I’m not at all knowledgeable about martial arts or MMA, it always seemed like an interesting thing to do might to use some sort of an ELO system for fighting as well: a really good lightweight might end up fighting a mediocre heavyweight, and the overall winner for a year might be the person in a given <skill, weight, sex> class that had the highest ELO. The only real reason to limit the ELO gap between contestants would be if there were a higher risk of injury, or the resulting fight were consistently just boring. But if GGP is right that a big upset isn’t unheard of, it might be worth 9 boring fights for 1 exciting upset.
Not only skill level, but usually physical capability level (as proxied by weight and sex) as well. As an aside, although I’m not at all knowledgeable about martial arts or MMA, it always seemed like an interesting thing to do might to use some sort of an ELO system for fighting as well: a really good lightweight might end up fighting a mediocre heavyweight, and the overall winner for a year might be the person in a given <skill, weight, sex> class that had the highest ELO. The only real reason to limit the ELO gap between contestants would be if there were a higher risk of injury, or the resulting fight were consistently just boring. But if GGP is right that a big upset isn’t unheard of, it might be worth 9 boring fights for 1 exciting upset.