Per my comment above - those industries tend to be government protected in a variety of different ways, and with all the fundamentals (sustainable company culture, most capital expenditures done, capital available as needed). It's essentially a sheltered niche.

Germany is also quite 'stodgy' and not adopting many of the changes (social, technical, etc.) until things have been worked out. Which just isn't the way the US works.

For better or worse, the US is the wild west in these issues. You end up with companies overextending themselves and blowing up (not just here of course), or companies not pushing hard enough and getting swallowed by or crushed by competitors - churn is harder, faster here, as is the adoption of new ideas.

There is a reason Germany has essentially zero interesting tech companies, and it isn't because engineers don't like beer.