(1) heart attacks are the commonest form of death. (2) although a diet high in fat and salt is associated with a higher risk of cardiovascular problems, it is not a guarantee of them. (3) the gentleman in question was in his sixties. The life expectancy of someone from his birth cohort is in the low to middle seventies. A huge mistake people make is to assume that 'life expectancy' indicates the age that people 'should' live to. In fact it's the median age of death. So in other words, half the people in his age cohort would not be expected to reach their mid-seventies.
Therefore, what we have is a case of a man in his sixties who has died of a very common cause of death at a not improbable age. We don't know if his diet was a contributory factor, and even if it was, there's no guarantee that the same diet fed to someone else would have the same effect. So what's the issue?
Eh, there are no jokes. If anyone out there thinks the CEO of Mcdonald's actually eats that crap they are kidding themselves. He was the CEO, not the fry cook.