And to get tenure, and to get further research grants, and to make money from the sale of their books, and be provocative enough to get their name known, and...probably quite a few other things.
Not to be cynical, but I don't think there exists a person whose life can be completely divorced from the needs for income, recognition, and other such values. Everyone has some sort of agenda, just to get through the day. I don't mean that in a bad sense, just that we all have a sense of our purpose in life and we all follow our own path to find it. Even researchers.
