My mother, who was raised in a German farming community (even though it was in Ontario... everyone had German last names and spoke the language so I'm hoping this counts) never cooked with salt, and I seem to remember that Grandma never did, either, apart from pinches that are necessary in baked goods or they don't turn out properly. I'm the same; to me, salt tastes unpleasant and I really don't like eating out at many restaurants because of it. On the bright side, I hope that this means that my risk of hypertension is minimal!
I'm suspecting that the visitor from Germany is simply another of the vast number of salt-addicted individuals in the world--nothing particularly cultural about it and not something that I'm equipped to comprehend.