... but if he or she attended some coach-training, he or she might understand better how other people learn things, and become a better Aikido instructor.
But there exist different theorys about how people learn things. Those you can learn in a "western coaching course" will follow specific "western" paradigms.
Learning just by repeating kata time after time represents another way of learning. (No thinking about, no trying out, no need to understand ...) But just this way of learning just by the body and not by mind. Just by feeling and not by knowing is essential.
The way aikido should be taught better can not be learned in such coaching courses.
You can only learn how to be a good instructor in "western" paradigms. And you can notice the differences to how you are teaching aikido.