Not that there is much life in this thread but....
Here is an insightful article about a karate class, with thoughts on value, from a lay parents perspective:
(taken from the article)
‘It’s a complete rip-off,’ I told Sasha when she was pleading with me to let her take the test.
‘Oh come on, Dad. We’ll look like idiots if we don’t have our red-and-white belts.’
‘On the contrary, the red-and-white belt is a sign that you’re an idiot for being suckered into this ridiculous Ponzi scheme.’