Some stutters are psychological, like I said I'm fluent alone, and stutter more in certain circumstances. That is a psychological problem, doesn't matter if you have studies to 'disprove' it. If yours isn't psychological then fair enough this theory wont help you, but acknowledge that it will help some people before marking it as 'Not a cure' (If that's you). Look at the video likes and comments, it's full of people saying how it's actually helped