You have to understand that when we say boxing or MMA we are not talking about concrete particulars. Is boxing a material thing that can be measured, quantified,has a location in space and time, etc? It is a concept, a cluster of principles, techniques, rules, etc. You confuse this with concrete particulars that exemplify boxing more or less. Since there is no perfect boxer who best exemplifies boxing we compare the concept of boxing, or more aptly thw set of boxing with the set of MMA. I claim that boxing is a subset of MMA and so it cannot require more education and cannot have more subtlety than its power set.