And there are no other students at any college other than CS students? I'm not sure why a biologist or a literature student would need to be au fait with Google's admittedly fairly unfriendly email management setup.

Digital literacy is important to every field. Email filters are not some arcane computer science concept, they are the modern equivalent of filing physical mail into the right folder/pidgeon hole/inbox/whatever.

Biology is a great example because of just how important digital record management is to experimentation in the field.