You are welcome to continue believing this inaccurate information, but it is not fair for others to think there’s no safe sustainable options available. They exist but they involve very difficult work. Do I like starting my mornings making calls to coffee shops to practice voluntary stuttering?? No. Do I like having to make eye contact with a listener as a block is forming? No. But when I do those things, my blocks start to dissolve, leaving me able to say what I want, when I want, and how I want. And for reference, my dysfluency was so debilitating, I once took a medical leave from my job as an educator.