Is it "Schlocky" to Compare Life Expectancies Between Countries?

FiveThirtyEight: "That said, life expectancy is important. If you're going to make a raw comparison, I'd rather compare countries on life expectancy than on cancer survival rates or the availability of hip replacements and cataract surgery. Or, to put it another way, if health care doesn't matter, if the main driver of life expectancies in America is the way we eat and live, then maybe it would make sense to spend 50% less on our health care system."