So often in our lives, we act as though there were only one set of rules. For instance, in cooking we tend to follow recipes with dutiful precision. We add ingredients as though by official decree. If the recipe calls for a pinch of salt and four pinches fall in, panic strikes, as though the bowl might now explode.
Thinking of a recipe as a rule, we often do not consider how people's tastes vary, or what fun it might be to make up a new dish.
Some thoughts on creativity
Personality and convention