Strategically, you want the semi jobs to seed local expertise.
Mercedes got $260m in Alabama in the early 1990s, BMW got $150m in South Carolina in the early 1990s, Volkswagen got $570m in the late 2000s in Tennessee. That's close to $1.6 billion inflation adjusted from just three examples of it.
The US economy is six times the size of Germany's economy, so those are massive subsidies in relation.
They don't even have all of the x86 market. https://www.extremetech.com/computing/335650-amd-achieves-al...
It’s not like there is such a large choice of companies if you want to be able to produce chips in Europe.
For example, America has a habit of forcing American companies to push American foreign policy. For example: Google dropping Huawei.