Answer:
This statement can be approached by many angles. Healthy people may have the possibility if being healthy during to genetics, this from an evolutionary standpoint makes them better candidates for reproduction and continuing the species. This is because it makes the offspring less likely to die from partially genetic influenced diseases (cardiac disease, obesity, etc.). Healthy people also protect people more prone to disease. They provide group immunity, for example someone who got their measles shot and is not able to get measles protects those with autoimmune disorders that can't get a shot. From a social standpoint healthy people can also influence others to be more healthy. By promoting healthy habits, they can inspire more people to follow those habits and improve the overall health of a population.
