The classical man's worst fear was inglorious death; the modern man's worst fear is just death - Nassim Nicholas Taleb

Injecting some confusion stabilizes the system. Indeed, confusing people a little bit is beneficial — it is good for you and good for them. For an application of the point in daily life, imagine someone extremely punctual and predictable who comes home at exactly six o’clock every day for fifteen years. You can use his arrival to set your watch. The fellow will cause his family anxiety if he is barely a few minutes late. Someone with a slightly more volatile — hence unpredictable — schedule, with, say, a half-hour variation, won’t do so.

Basically this category would include those who think that the cure for obesity is to inform people that they should be healthy.

Heuristics are simplified rules of thumb that make things simple and easy to implement. But their main advantage is that the user knows that they are not perfect, just expedient, and is therefore less fooled by their powers. They become dangerous when we forget that.