Your diet is better 100%. Toxins and shit from processed food has to leave your system in many ways. Although showering and hair clipping are significant, all factors the same the good bacteria are inhabiting armpit. Why else would nature (god) give us a nose? To find bad bacteria that is really good? We run from smelly people for a reason and the simple fact of natural selection is probably the most simple way to explain that your better is closer to homeostasis, what is “right” also the sweat you release when you are nervous is different so many factors coalesce into stress like diet and lifestyle but overall take the good smells as a green light to keep up what you are doing. I mean think about it dentistry wouldn’t exist without bread/ sugar refined carbs and ugly teeth are repulsive. Everything goes back to man’s natural state of living pre industrial.