Ever read the full title of his book?

"On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life"

https://en.wikipedia.org/wiki/On_the_Origin_of_Species

Cheap shot, I know. However, I do agree with your observations on people who refuse to take care of their own health, especially the ones who then expect other people to pay for every penny of their (often useless) medical procedures, which would have been easily avoidable had they exercised even a little bit of self-discipline.