I don’t think it’s fair to generalize like that. I was selectively mute for many years when my stutter had the best of me. I’ve been through the struggle just as much as anyone else. Severe blocks. Convinced myself I couldn’t say my name for a long period. I’ve lost people in my life from checking out due to stuttering. I am not those things now and shifting my outlook from negative to positive played an immense role in me becoming more fluent.