200 unique items is just a basic house. You are forgetting all the essential products used to operate said house as well as all the family members inside, plus pets. 200 is average.
After I posted I had the same thought. But then I realized that durable goods from a store usually come in packaging, so measuring outgoing material isn’t as inaccurate as it sounds as first.
Most of us are really pretty bad at tracking our purchases. We don’t want to look at them because it means admitting we have a problem. But we know the trash is full all the time and don’t think about how that correlated with consumption. Basically I was trying to trick people into an honest conversation about something nobody likes to be honest about.
And at any rate if the quantity is “more than 200” then it just reinforces GGP’s point.