Absolutely not! Here is why: https://www.stuttering-specialist.com/post/freedom-of-speech-how-i-overcame-stuttering Basically you begin to form somantic memories around certain words and situations where you stuttered and were uncomfortable. This contributes to that word causing a further block down the line, essentially self perpetuating. The article is very long but I highly suggest reading it. If somantic memory formation is a lead cause of persistent stutter remaining until adulthood then that would also very much explain the anecdotal reports who outrageously claim they took shrooms and it magically cured their stutter. Psilocybin is experimentally used to do treat ptsd using the exact same mechanism; re imprinting memories. My point is, please read the text and about the deeper, neurological mechanisms behind stutter before you take any actions, or you risk making things a lot worse for them