The news revolves around "new" stuff, not reporting things people generally know. At young and even middle ages, people dying of anything is highly unusual and skews more towards some of the unlikelier causes compared to the breakdown of all deaths. And it's general knowledge that the elderly commonly succumb to heart disease and cancer. I love the site and the article is interesting with good data but I don't think the premise of this article was quite right.
But by not reporting on things people generally know they end up with skewed knowledge of what they think they know. Thinking that you're going to die of an unlikely cause is generally wrong since it's unlikely, yet talking to younger people that are newsies and they are more likely to think they will die of such rare things.