I, too, agree... for me, at least, I don't care that my wife really understands what I do (although she gets it to a point). For me the important thing is that she isn't bored by me talking about it :)

That is to say, while she doesn't really understand it, she will let me talk/vent about it as much as I need to. Just as I don't really understand what she does, but I'm more than happy for her to talk about it.