Making weak people less weak is not the same thing as making weak people strong. This is the unfortunate result of weak people training weak people.
Because weakness begets weakness.
Only the scale changes and not in a favorable way.
Most trainers, instructors, and coaches rely on the former for testimonials and income. The prevalence of mediocre training programs in the fitness, martial arts, and self-defense industries accomplishes this bare minimum of improvement and sustains many in undeserving careers.
But taking a weak person and making him or her stronger, not just less weak, is another thing altogether.
That takes a type of emotional salience most experts in the field lack; it not only requires a level of expertise beyond the ken of most self-appointed "authorities" but also a precise understanding of human nature. It is the application of emotional intelligence in empowering another through aligned values that creates something greater than the sum of its parts.
Anyone can foster marginal gains; it is almost laughably easy to take someone from incompetence to competence. Taking someone from incompetence to greatness? That requires a value system on the part of the mentor that isn't simply incentivized or egocentric. It requires strength.
Because strength begets strength.
The scale is always tipped in its favor and especially when it is shared.