I agree that there are certainly people who are driven to do a job not only right, but better than one could hope for (my husband is such a person). But I think saying there are only two options is an oversimplification. There are people who don't care if they do it wrong, and others who do care but have limited control over how a task turns out. Sometimes it's better to care, but not care so much that it cripples you when you fail.
It definitely impacts Aaron's life. He's so committed to his work that it seems like he's almost always there, even when it would be better to remain home with Rachel.