Maybe I'm the only guy you know who isn't a better football coach than the guy on the field; maybe I'm the only guy you know doesn't even know the rules of basketball, or hockey or soccer, or rugby, etc.; maybe I'm the only guy you know whose only real interest in baseball is statistical, but I know plenty of guys who are similar and make no pretense of expertise that they do not possess. But ... I am quite capable of coaching at rather a high level, in several other areas that do have extensive experience in. I was a nationally ranked fencer in college, I have taught my son to fence, for anything that he is going to encounter (below intercollegiate and Olympic fencing) there is little or nothing that a "real" coach will be able to do for him, my basics are strong and I can teach him the footwork and blade-work and conditioning drills that he needs (or for that matter everything that he should be concentrating on) up through the varsity high school or youth club levels. Now if he were some phenom, a nationally "A" rated fencer at 13, I would have to find him better coaching (which might be hard here on Hawaii). So why don't I go to all the coaching clinics on the mainland and open a studio? I'm not really that committed to it, that doesn't mean I could not do it, but making my living as a fencing master just isn't my gig. Similarly I've know (hell, I've trained) many, many fine divers who are also great diving mentors, far better than most instructors that you'd ever meet. But they have no interest in the BS of the field or paying dues, or carrying insurance, etc. They want to dive, and sometimes to be able to turn a relative or a friend on to diving and they do a fine job (I know because I often certified these "friends and family" under the experienced diver standards).