Were Newton and Darwin mistakes for the University of Cambridge?

The distinguished anthropologist Dame Professor Marilyn Strathern, now in her eighties, has been writing on Newton for about a decade. Presumably, her long association with the University of Cambridge influenced this choice. My response to this choice of subject does not concern the detail of her writing, rather social structure, a traditional theme of British social anthropology. I pose the question: should geniusesfor-everyman such as Newton and Darwin be at Cambridge? Should not the lecturers at a Cambridge college be all experts who fall short of greatness? But why? I consider some explanations.