I have a different experience with weed. I used to smoke quite a bit but it never made much difference to my stutter. I stopped a while back because it started giving me anxiety and my speech suffered a lot from it. But I agree with you, the less you care what others think the better it becomes. It's a process, but over the last few years I've been trying to not care as much about what other people think and it's been very beneficial to my overall performance.