of course you really can know more than most people in [x subject], and you could be simply stating what you perceive as a fact. but if arrogance is involved, it's not simply a cold objective statement but an ego-driven issue (even if it happens to be true). imo, arrogance is often a cover. it's just that its origins may lie deep down. but imagine how much easier it feels to get through life practically, functionally, professionally etc. if you have some arrogance. it will get you into trouble, but if your fear fixation centers around your competence, in a way that's far better than the alternative, which is uncertainty and panic. (if you are in the state of fear, you won't be able to be competent for sure.)
that said, it's my impression that many type fives are comfortable with uncertainty, especially if
ego because that simply is the kind of medium their consciousness is in often.
also, the piece i'm puzzling over is the connection between confidence in one's perception and competence in practical life matters. both are coming into play here and are interconnected with one another.
ps: arrogance is also a way to push people away.