My scalp condition is that I have too much hair. Too dense and thick, it gets greasy after not washing it 1 day, so I don’t even dare to replicate your experiment.
I also used to have a cold weather dandruff problem, but that was solved entirely when I started always air drying after every shower. Thanks to a random tip years ago on reddit. My dandruff problem was apparently because of humidity.
Maybe it’s because it was in the same language group as those others that polish got singled out. People who speak an Indo European language will expect to be lost when first trying to learn a language outside of the group, but might not expect to be so confuddled from a related language. Expectations basically.