Becuase we're proved that a economy based on financial engineering and construction and selling each other houses has worked so well?
Looking at GDP figures, Germany was hit much harder by the global downturn so far than the US. And we do produce things you can touch with your hands here.
(Ironically, a few years ago Germans were worried about the heavy reliance on industry. Pundits worried about how Germany might close the gap to more modern service economies in the UK and US. They imagined a ladder of value adding that starts with agriculture, goes to industry, and then to services.)