You see, this is how you're incorrect. The study of evolutionary theory has practical application not only in the medical sciences and biology, but fields beyond biology as well. For example, an important aspect of modern oil exploration is micropaleontology, the study of the microscopic remains of bacteria, diatoms, pollens, and protists. Micropaleontology is by far the largest field of paleontology, and has broad application in envrionmental engineering and mineral exploration. So, if you drive a car, or use electricity from coal-fired power plants, then evolution has had an impact on your life.
And none of what you mentioned depends on whether we evolved from apes or not. Not one iota.