Humans wouldn't have an over population problem if these idiots would stop trying to play god. Mother Nature always does her magic to keep everything in balance.
Communicable diseases were a great way to shed a species of its weak. Oh no, we had to interfere. Chronic diseases were a great way to shed a species of its weak and ailing. Oh no, we had to interfere there too. When a population in an area rises far too much, the men and women adopt behaviors which cause birth rates to decline and in turn shrink their numbers. Things reverse when the total drops at or below what would be normal. Oh no, we had to interfere there too.
If we eliminate all diseases and other issues in order to have long healthy lives, how do people die? Through violence or engineered purgings like this. Give control back to Mother Nature.