Which skills you use in a particular game is very much setting and campaign dependent. If you were playing a martial-arts themed game with studied unarmed combat disciplines, you probably wouldn't want the skill to be called something as crass as 'brawl'. Similarly, if athletics competitions were a big feature (a setting inspired by the ancient Olympic games, for example) you might want to break 'athletics' into more skills. It all depends on your focus. In a ruleset intended to be generic to a degree, you can only chart a middle ground by keeping skill names broad, and give advice to GMs on how to change skills to suit their particular adventure as appropriate.