You may use the article for your students. It is good to hear from a traditionalist who is still in the fight. Strict standards are tough for a school to maintain in today's society, and still be profitable. Students must learn that the things they will treasure the most are those things that were the most difficult for them to achieve.
High standards for attaining the rank of black belt are admirable, however, it sounds like the questioner holds out the promise of awarding a black belt to juniors, when there is no intention of ever awarding one to a junior. If this is the case, is the questioner being truthful when enrolling junior students?