Seems to me that the real/only reason for SPJ not to use Comic Sans is that using it distracts people (in general, since he notes that he gets lots of comments about it, I'm not personally distracted by it) from what he's saying.
So it might make sense to use a font that goes pretty much unnoticed, to put the focus on the content of the talk. Then again, maybe he is thinking more along the lines of "if my font choice is the most important thing to you, feel free to leave/not watch this talk."
I feel like, if I were advocating something (FP, Haskell, new ways of teaching computer science, or whatever), I would want to do everything I could to keep the discussion on-topic.
So it might make sense to use a font that goes pretty much unnoticed, to put the focus on the content of the talk. Then again, maybe he is thinking more along the lines of "if my font choice is the most important thing to you, feel free to leave/not watch this talk."
I feel like, if I were advocating something (FP, Haskell, new ways of teaching computer science, or whatever), I would want to do everything I could to keep the discussion on-topic.