I for the most part agree with you Bob. What I have seen all too often is people going into a LDS expecting to be trained to a level where they feel competent. They take the course only to find that they don't feel ready. Some courses are designed this way. Students then enroll in AOW with the hope of receiving the training that wanted to receive in the first instance.
Personally I think it's about being honest and giving people full disclosure. Yes there are students that can breeze through a short program and gain experience by doing. Many others experience insufficient time to achieve the skill-sets, knowledge and lack the confidence that they require to enjoy the underwater experience. All too often these people quit diving without taking further training, thinking that they tried it, feel insecure and end up leaving the sport.
Some are led to believe that they need to have an instructor or DM with them to be safe, hence further training and the perpetuation of a never ending cycle that promises much, but often just doesn't deliver. Some people don't have an option in the type of training that they can receive and for those that do, they fall for a well-crafted marketing plan, or the advise of the LDS who have visions of dollar signs. It's buyer beware. I know it's all fair in love and war, but it's unfortunate at the same time.
I guess what I'm saying is that people don't always want to take "specialty programs." Many only seek the training that they lack and don't feel they have an alternative. The result of diluted program content.