Who cares if you have a huge dropout rate? You'll still have a completion rate that is way more then any conventional class and even the dropouts will have learned something.
The education system has built a big blind process that isn't about learning. It is about the process. If you happen to learn at the rate that the info is fed to you and if the process intersects with your learning style then you are great. If you learn faster or slower or in a different fashion then the accepted process you are screwed.