My interpretation is that fof+hot might not have immediately obvious utility, so that it's made into myth(heuristics?) when it's particularly valuable. For example, in fof+fot it wouldn't make any sense to allow yourself to be slapped, because you need a complex casual model to justify it.
But echoing others in the thread, I'm not too sure and wish the author had written more on the topic or gave some references.
But echoing others in the thread, I'm not too sure and wish the author had written more on the topic or gave some references.