I can't speak for other trainers or courses, but I know there are only 3 reasons for this happening:
1. Poor amount of information given by the trainer, false information or very basic information with no in - depth explanations
Our say: all the information and methods I give to my students are based on facts and science and used by myself. Every topic is bro ken down extremely in depth.
2. Poor, incorrectly built educational programme, difficult to understand training methods or/and no personal ongoing support Our say: I am a qualified trainer myself and all my training programs are created with help of a profe ssional methodologist to ensure an efficient learning process.
3. Student attends the training, understands the trainer, but does not accept or use the information given in the course. Our say: Here everything depends on yourself! It is important that you n ot only complete the course, but also implement the information and trust your trainer!