If it's impossible to beat how do you so many people who have beat t.

If it's impossible to beat how do you so many people who have beat t. By beat I mean gotten it to a point where it isn't significant and people don't give you weird looks. Here are some example from the a top my head. Joed biden, Ed Sheeran, Canadian politician Patrick brown, Youtubers: Entrepreneurs in cars, /u/ItsChazB (he's active on this subreddit alot), BrocaBrothers, Michael Williams and even a few relatives of mine. (My stutter is 100% genetic) For that reason I still think it's mostly psychological. Yeah there's the whole brain thing that totally makes sense but knowing how significant brain changes are throughout a person's lifetime it doesn't really seem implausible that some neuroplasticity isn't going to effect it. I also noticed I stutter signifnaly more when I'm tense, anxious, depressed or around people. Alot more. So there's a definite strong psychological component in there. And seeing people having cured there stutter I don't know see why I cant. what mindset these people had to cure it but they did it somehow and at varying ages between 17-30s. So I don't know.