If everybody just made better stuff they would not need imports from germany anymore. The motivation of trade has always been imbalance. I fail to see how those imbalances would smooth out. (Leaving out the perfect world scenario that every country would have some unique, equally valued tradeable thing/service/whatever, a fair starting situation so to speak. This would be ideology)
If everybody made better stuff (and did not need foreign imports), the world would just have a lot of better stuff (i.e., everyone would be wealthier).
The motivation of trade is simply comparative advantage. Trade is beneficial regardless of whether the products being traded have equal value.
