That is a common misconception because people like to judge based on outside appearance and abilities. I actually became a Mensa member this last month. It really explained a lot of my questions surrounding why I feel so different than others. (Due to my stutter and other factors). Anyway, I would love to chat to some people suffering, because I believe I can offer some tips that helped me achieve a "worry-free stutter". Dm me freely! Have a nice day people!