I think one has to experience it oneself though, my friends and relatives who never left the suburbs pity me for my restricted living space, and don't believe me when I tell them live is easier with less baggage and it a walkable center of town. I suspect they think I'm rationalising an inability to afford a suburban McMansion.
Yeah it would be easier if we didn’t buy them so much shit. But that’s a deeply ingrained part of American culture. Who has the time to cut their kids off from friends, extended family who buys lots of trinkets for every holiday, etc? Trust me we tried to fight that battle and all we have to show for it is a two inch thick layer of dinosaurs in the living room.
I suspect you're right that a lot of it has to do with the surrounding culture - almost nobody in Berlin lives in large homes (there are very few houses and most people live in 5-8 story high apartment buildings) & I think Germans as a habit just don't buy as much crap.
I grew up with a similar culture in India, but now live in the US where every Christmas, I receive a ton of stuff I could do without.
I have a question for you – wow many gifts do Germans give each other for Christmas, and what sort? I had just kind of assumed that most western countries do these things similar to the US, but as I have found out in the past that might be an incorrect assumption.
But Germans generally don’t celebrate holidays in massive gatherings, I would expect my mother in law to join us, or maybe 1 other person. It would be unusual for the number of people to reach double digits.