People die. People get sick. Everyone you, and I, know is probably going to suffer and perish.
The poor soul in the blog post sounds like he got struck down in his prime; but rest assured, your time is coming in a matter of decades.
Accept death/disease or do something about it; but don't be shocked when it happens! Statistically, it's going to happen in increasing rates as you, your family, your friends, and everyone you know gets older.
Being blindsided by death is odd. A cognitive bias?: 'It won't happen to me'. But, quite frankly, it most probably will!