Because every kind of work has components that you find pleasant and ones you don't like as much. It's not realistic to just say "I'll try to avoid the part I don't like", especially when there's usually some parts that _nobody_ likes.
Yes, that's very true. I believe the point here though is to play to your strengths for the good of the project. If someone else is better at the detail work then let them do it. The project as a whole will be better produced and that's your end goal. We're not here to build character by completing unwelcome tasks, we're here to build products.
