[dlwj]

Imagine you need to cross a tightrope to do something amazing and everyone is afraid of heights.

Some forms of criticism are useful but yelling out "Hey, it's 2300 meters to the bottom, be careful!" is not very useful.

People often know the negatives, it's just easier to do the task when you don't look down. Often this requires self delusion. Otherwise "Don't look down, or think of white polar bears" would work for everyone.