My husband’s an INFP too, and I’m an INFJ.
My take on Jun Wu’s post wasn’t that we were a mix, but rather that half the types were represented and the other half weren’t. There were a ton of INFJs and INFPs, even though we are both rare.
And there were almost no S’s. The way I think about S vs N is that S is like the politicians who don’t care about gay rights until their kid comes out as gay to them; like, unless it personally affects them, they have a difficult time understanding why it matters.
So it totally makes sense to me why writers would usually be N’s, who are more practiced at understanding that everybody has different perspectives, even if we don’t personally experience them.