I don't know what you're saying either, because not only is it completely at odds with the measured data presented in a lumber university textbook, but you seem

I don't know what you're saying either, because not only is it completely at odds with the measured data presented in a lumber university textbook, but you seem to be unclear on how moisture is even measured. Please reread the section about fsp and measured MC, because it explains clearly why wood does not expand beyond it's fsp ~30%. Then look at the simplified MC% vs RH% table and read data for shrinkage vs MC for various wood types. No pay walled university papers required, it's not that complicated. If your wife's door is 2" out of square you probably have a house framing issue not door expansion due to indoor humidity. I've sawn enough timber and built enough decks out of them that I know wood moves.