Firstly it's run by other people who have a stutter and have learned how to manage it. The McGuire Programme is completely opposite from slp. The programme teaches not only physical techniques and tools but also psychological and emotional ones, as well as skills that will make you speak better than the average "fluent" speaker. Look it up online, you will find a multitude of online content about it. I would say the McGuire Programme is the most popular and successful organization that helps people overcome stuttering in the world.