And f) most passive house designs have humidity/mold issues down the road, unless proper and frequent maintenance is done. (I've read about passiv haus and similar a while back).
I'm also skeptical because houses we build today should be in use a 100 years from now. And it's really obvious that renewables aren't supply limited like oil and gas. But in the passive house world it's always 1980.
This obsession with mold looks to me as an exclusively US thing. I have no first-hand data but I guess it's due to insufficient air flow combined with air conditioners pushing humidity all the way up.
Cold climate results in low humidity. If you're mostly heating your home (as opposed to running aircon 24/7), air inside tends to be of lower humidity than outside. So low that it becomes uncomfortable and one has to use humidifiers.
The only place mold has any chance in those conditions are the leak spots on the fridge door seal.