It makes a lot of sense to me. Or at least I wouldn't mind it.
I believe the "isolation from other people" have to do with a certain bit of "wow, look how much I have found here with this one person. I really want to spend a lot of my time with him/her". I think the two types make a great couple. But then again, INFjs are my dual, so perhaps I'm just talking through my hardwiring.