I think it is probably due to the Extraverted nature of it, in general. Fi are more subdued in appearance compared to Fe, and therefore are perceived less intrusive.
I'm not sure I've heard it phrased this way before. It makes perfect sense. Also, the reason for wanting to know the rules of play with inferior Fe. And why INFJs can sometimes get so antsy if the rules aren't spelled out. And, and, and. It all suddenly makes sense. Thanks!The disdain for Fe comes in from the fact that it represents the opposite of Ti, sort of. Objective emotion versus subjective logic. One tries to create rules for everyone, one tries to find the best path in a situation. Fi is the same in this way, it is individualized, thus making it, even though... retarded, more relatable.