First, a criticism that I hope you'll perceive as constructive: your essay is too long. Most pieces here on Medium require five to ten minutes' reading time. Moreover, the lengthy discussion of therapeutic issues is not germane to what, in my opinion, should have been the thesis of your piece: that stuttering is a handicap that does not represent an intellectual deficiency.
Second, a suggestion: the primary significance of stuttering is that some people find it laughable. I have found that using inkhorn words intimidates a lot of people. Samuel Johnson's dictionary is full of them, and I find many of them delightful. For example, "daktylodeiktous" describes a person worthy of being pointed out--a celebrity. "Slubberdegullion" is a beautiful put-down word. A 'rampallion' is a mean wretch. Other great put-downs are 'ninnyhammer', ' nizy', and 'scroyle'. A 'quodlibertarian' is one who loves to argue about everything. 'Scrutation' is a kind of investigation. 'Tenebricose' is dark.
On the lighter side, 'bathykolpian' describes a very well-endowed woman, as in "Whoa! Get a load of that bathykolpian babe! I'm in LUV!"
It doesn't matter that you didn't learn these words by assiduously reading mountains of literature. People irrationally assume that an obese vocabularly indicates intelligence, just as they irrationally assume that stuttering indicates mental deficiency. So fight one irrational prejudice with another! 😁