Has " trying not to stutter " ever been a technique that has worked for you?

Has " trying not to stutter " ever been a technique that has worked for you? I find that the best/smoothest conversations I have are spontaneous ones. Where someone will suddenly start talking to me, and I have no idea what they're about to ask. Because my mind has not yet gotten the chance to get anxious or " pre-block " my speech patterns because I have no idea what I'm going to say. When this happens, sometimes I won't even stutter at all! It's so easy to talk. In contrast, the worst/most difficult conversations I have are times when the conversation is planned beforehand. Job interviews are the worst. It's like I'm 2 different people. In job interviews, I am an absolute wreck of a human being who seems incapable of even buttering a slice of bread. But in spontaeous convos, I appear like a normal person who just happens to have a stutter. So it makes me wonder, how will I ever be able to ace a job interview? Because all of them are planned beforehand. I need to somehow replicate my spontaneous-conversation method of talking in an anticipate talking situation. How do you do this Lol? Do you have to fool your brain into thinking " There is no event. It's your imagination. You're crazy. You're just imagining things ". And then when the event comes, you treat it like a surprise event?