Since most people prize a black belt (the physical object, and the rank it represents - not the person), and some significant development tends to happen (in my primary art) after reaching that point, I thought it best to have a path to it that doesn't require everyone think like me. I wanted to teach from the point I developed any competency in the art. To require someone actually have their own school to get that rank seems unnecessarily onerous. Even people with a lot of passion for the art - and a desire to teach it to others - may not have the inclination (or financial position) to take the risk required to run a commercial school.I am happy to know I am not alone alone. I needed to have a school before black belt graduation. Teaching is not bad, just it was too early to be the principal at the cost of my (training) time. I was rather interested in learning and 'afraid' of managing a school, while still at university...
I still believe that school could have much more high rank people (even if not black belts) if they did not put too much pressure on the advanced ones. Some people just want some training within a limited time. As for combat sports, some guys are not there for the competition. No point in forcing it. No one wins.
@Ironbear24 if you want to teach martial arts and having plenty of students be ready to please all these kinds: the not serious, the moderately serious and the obsessed.