Lol when I was 18 I thought 30 was "up there" but I'm getting really close to it and when I look at myself and my friends, 30 is still young. It makes 18 seem like child-age. You're 100% correct in my opinion. With age comes caring less about what others think about you except for the people that actual matter, and they won't think any differently about you for stuttering. Yeah it sucks, but there's no cure. Just gotta work around it and do what works for you.