I would recommend watching the password protected Vimeo version. The slides are fully legible on that one (and the sound is better).
I think this is a good example of treating these reactions as a "fourth quadrant problem".
By that, I am obliquely referring to the (by now) familiar idea often referred to as "black swan theory" - in which problems are assumed to fall into three categories. These are often labelled as problems with "known knowns", "known unknowns", and "unknown unknowns" - the last being the eponymous "black swan".
However if these phrases are tabulated, in a 2x2 square, you will see that there is a fourth quadrant, that can be labelled "unknown knowns". This fourth quadrant represents things that many people already know - but in the process of analysis we have ignored as irrelevant, forgotten about, dismissed as unimportant, or they are so far outside of our particular discipline that we either never learned they existed, or we are totally blind to them - even when looking straight at them.
This last issue is related to what the late, great, Douglas Adams referred to as an SEP Field.
Douglas Adams' 1982 novel Life, the Universe and Everything (in The Hitchhiker's Guide to the Galaxy comedy science fiction series) introduces the idea of an "SEP field" as a kind of cloaking device. The character Ford Prefect says,
"An SEP is something we can't see, or don't see, or our brain doesn't let us see, because we think that it's somebody else's problem. That’s what SEP means. Somebody Else’s Problem. The brain just edits it out, it's like a blind spot."
The narration then explains:
"The Somebody Else's Problem field... relies on people's natural predisposition not to see anything they don't want to, weren't expecting, or can't explain. If Effrafax had painted the mountain pink and erected a cheap and simple Somebody Else’s Problem field on it, then people would have walked past the mountain, round it, even over it, and simply never have noticed that the thing was there."
So, maybe, rather than assuming that there must be a mysterious black swan hiding behind a particular problem, we should spend more time applying what we already know, and ridding ourselves of particular blind spots.