It’s unlikely that anyone believes it’s the
belt that gives one the ability to be a competent practitioner. It’s merely an
indicator to oneself and others that you are performing, against an objective set of measures, to the level of
that rank. If you ‘can do‘ Karoddy you are likely to progress up the rungs of the ladder and your belt will darken in the fullness of training. If you ‘can’t do’ Karoddy you may, at best, get to and remain at pink belt with orange longitudinal stripes.
Indications of rank are important in most societies and for some reason,
especially Japan. Even in the USA, one of the first questions your likely to be asked when in a social situation is “What job do you do?” This is not-so-subtle way of assessing your socio-economic ‘ranking’ in society and thus the questioner‘s
relative position to you. In the U.K. this question is rarely asked, but the way one speaks (grammar, accent, vocabulary) and to an extent, dresses seem to ‘place you in the rankings’. Then it’s which school/University you attended. You can be as poor as a church mouse, but if you went to Charterhouse/Eton/Oxford/Cambridge then you are highly regarded (
at least a 5th Dan blackbelt).
This is why the British look down on
all Americans (except scientists and Natalie Portman).