Fe is about self-expression and communication of feelings, thoughts, and desires, so it is naturally linked to getting to know a person. Fi has to do with more purely "inner" qualities.
But is our identity to be found in those ideas? In this way, I think our actions speak for ourselves. I identify SLI/ILI by their reticence as well as whatever may hide behind it. If I consider getting to know somebody the same thing as digging through their Fe box, then of course Fe PoLR would be hard to know! But that would be my fault, not their fault! This disagreement seems to be one of what we consider “getting to know” and “someone” really is. However, I see myself as the outlier here, so I concede.
But if this is indeed primarily about approachability, then sure, Fe PoLR takes the cake.
IDK, what do people who don’t care much about Fe think about how much it affects approachability to you?