As regards baldness, there are so many variables. I mean, Europeans are more likely to experience baldness, yet they are not necessarily less healthy than asians, say. Native Americans, being Asians, do have a genetic advantage re warding off baldness, but this has nothing to do with health.
One other consideration:- it is generally viewed by anthropologists that neoteny(having childlike features when adult) is a sign of increasing evolution. Since neoteny involves less body hair(body hair is a sign of maturity/adulthood) one could even argue that baldness is an evolutionary advantage re increased neoteny.