So for some, law is the profession they love to hate, while others truly hate it. Still others are taciturn lovers. Clearly, some standard more subtle than self report is required for determining job satisfaction. And yet, we're a little discomfited by people who are so unselfconsciously and thoroughly in the groove. The exercise of skills is pleasurable, even seductive, but like all pleasures, it can be exploited.
Competence is only part of successful adaptation.
Remember that the only task which counts is advantage in reproducing and transmitting genes to the next generation. Perfect adaptation in this context means that the organism and the environment together create a system for the perpetuation of the genes for which the organism is the carrier. Work is a social environment, not just a set of harsh weather conditions and predators. What's more, they were each other's tools in that contest. The evolution of human beings has consisted largely of adaptation to each other.