Are you saying that middle-class American white guys do not change the way they speak depending on the situation? Even a white guy 'in power' is going to speak

Are you saying that middle-class American white guys do not change the way they speak depending on the situation? Even a white guy 'in power' is going to speak differently to co-workers, when giving a presentation in front senior executives, talking with their wife, or with their friends at a bar.