This may be the truth for you, but it’s not universal. I know for me, even when I’m alone and not scared about stuttering, i still stutter. I talk to myself sometimes and i still stutter. It’s not all about fear. I can be 100% comfortable in a situation and still stutter. Speech therapy has changed my life. I feel so much better using these “techniques” to be more fluent. I stutter wether or not i care what the people around me think, so why not use some tricks to be more fluent? I see no issue with that. I’m not ashamed of my stutter nor did my speech therapy course make me feel ashamed of it. In fact i feel more empowered after. What you said may be true for you, but it is in no way universal. Speech therapy has helped so many and it does hurt to see someone being so judgemental