My personal opinion is that they tend to have you go thru so many hoops to get a black belt, also cost issues. I also think that after about 8 yrs. training you should be able to figure out a lot of your own answers, as instructors don't want to go in depth, besides some of the level one techniques. I'm talking about kata. Also Martial arts can be costly, I think that as a beginner it is worth it, but after about 8 yrs. you should just explore with a few fellow partners. you reach a point of dimished returns ,to me after 8 yrs. training 4 times a wk. you are a black belt for sure:)