You said it yourself. The less concern you have for people the less you stutter. There relies the situation. There is no coincidence that we are way more fluent when we are alone. Definitely, to dissolve stuttering mindset, we have to change our relation with other people. That´s for sure. That does not mean that we have to hate the other. But to be more indifferent. To be more concern about ourself and our decisions. And to trust our own hability to not only speak but to live life. Good observation.