What is rationalization? To me, it feels like a lower-level, more primitive part of the brain recruiting the verbal centres in an attempt to persuade the higher level part of the brain to do something short-sighted. Perhaps these people are unusually non-conflicted - for example, their their lower levels may have a lower-than-usual time preference, or their higher levels may be too weak to get in the way in the first place.

(I keep wanting to say "id" and "super-ego" here despite knowing that Freud isn't scientific. Are there better terms?).