Being a Black Belt versus Selling Auto Parts
Many black belts are similar to auto parts sales people. When you ask the sales person for a part, he or she asks you some questions about your vehicle, looks in a database for the part number, and retrieves the part. The person may be the best sales person in the store as far as total sales are concerned, but that is the limit of his or her abilities. The person does not know where the part is from, who makes it, what it does, where it is used on the vehicle, whether it will work in your particular case since you have made modifications to your vehicle, or whether another part would work in the same vehicle, but he or she is still the top sales person because he or she can sell a lot of parts.
Many Taekwondo black belts are the same way. If your ask them what technique to use in a particular situation, they have a stock answer that will work, but if you ask what style or country the technique is from, who founded it, what it does, where and when it should be used, whether it will work in your particular case, or whether another technique may be substituted, they are lost and confused. They only know what the "program" has taught them. They have no desire to further their knowledge and the instructors do not care because the black belts can move students through the system quickly.