"Mathematic aptitude spreads slowly through the gene pool. Thank the Gods, or we'd be all writing papers and playing on pocket calculators." Sure, she'd feel more at home, but mathematics was still a job, something best contained to work hours and left at the office. There were many other things she enjoyed.
"Besides, I know very little about biology and plant life, so... I suppose it's only normal that we should each have our area of expertise." Not only by virtue of their position in the university, but as people. Variety and all that was good for the human species.