In English, there is a need for bodies to teach the lower level composition classes, so the grad programs are kept fairly large to supply that demand
Something along the same lines (maybe) that has always puzzled me. When people do dissertations in English lit, do they really understand that they could possibly be teaching intro to Great Books or something similar to large classes of students who don't care?
I can't imagine having spent years studying Poe, or Waugh, etc. and being entirely wrapped up in that, and then realizing I'm teaching a bunch of snotty nosed Biffs and Ashleighs English Lit Survey 101 for the foreseeable future. Bless those forumites who do, and who do it with a smile, but is this really what you thought you'd be doing when you were struggling with your dissertation?
There may be a few sheltered geniuses at Yale whose advisors are all over 60 who don't pick up the realities of what teaching responsibilities are like, but the vast majority of us know what we're in for. And honestly, the obligation to teach the broad surveys means that I have the opportunity to read or reread stuff outside of my field, which just means I'm more broadly educated in my field. Teaching non-majors can also be refreshing. The pre-meds who are taking 3 sciences classes with labs
love being able to read a few books and write about them. Too much specialization for any of us can be suffocating. The one semester when I taught courses only in my specific subfield, I thought I would lose my mind. So, I appreciate the props, but it's pretty easy to do with a smile!