In assessing the value of a senior health-service manager or council chief, for example, the line between core competence and bonus-worthy brilliance might be hard to define.
Exceptional achievers always experience low levels of confidence and self-confidence, but they train hard and practice continually until they reach an acceptable level of competence.
When people are mindful of balancing skill and challenge so that cooking, or shopping, is neither so easy as to be a boring chore nor so hard as to be an anxious-making annoyance pushing the limits of competence and time then enjoyment can be found and increased.