Everything is okay in moderation. Yeast is a source of nutrients necessary for growth, proper metabolism and strengthening the immune system. By the way, yeast is a completely natural inhabitant not only in raw dough, but also in all fermented products without exception, including sauerkraut and yogurt, but we perceive them as natural probiotics and they are considered good for health, and, unlike baker's yeast, for some reason they don't cause such fear.