Why can a good understanding of human biology be useful throughout a person's life?

I'd say understanding human biology helps people make better daily choices. For example, knowing how sleep cycles work helped me adjust my schedule when I was preparing for that half marathon I mentioned earlier. I stopped staying up late and noticed my energy levels improved significantly during training. Also, basic biology knowledge helps when reading nutrition labels or deciding whether to believe those viral health claims on social media. My cousin, the nursing student, often explains to our family why some popular health trends actually contradict medical science. That kind of practical understanding prevents people from wasting money or risking their health.