I wouldn't like to fly with a pilot that doesn't fear what he does. In
other words, a mistake can kill. The fact that this fear is real and
vivid and acted upon makes air travel as safe as it is.
People act foolishly when afraid because they don't know what to do. On
the other hand people regularly are hurt or killed at their workplace
because they didn't know that they should be afraid.
How many times has people in this readership been afraid to apply a
change to a working system? The fear moves you to double check, get other
input, set up a test system, whatever.
Personally, when I fear things that I encounter regularly, I find out
what to do. Not to allay fear, but to know how to act safely.
Derek (who in his work is regularly in situations that could kill him)