I'm over 50 and can't imagine myself ever saying "I just have to have that groupset because it's made in Germany". I suppose it's just a perception that Germany doesn't have the same history and reputation of frame building and cycling innovation that other countries have. Seems like it could be an uphill battle lasting decades.
I don't buy Campagnolo because it comes from Italy.
What has the history of framebuilding to do with developing a groupset?
Cycling innovation? Dont let me laugh. Cycling frames and components are not a very difficult engineering section.
The thing best developed in cycling industry is marketingshit.
Germany is known for high quality Tools and precise Engineering.
That is the reason why people came with the idea of a German groupset.
That is also the reason why people will buy a German groupset.
To compare such a groupset with bikes currently made by Germans is thinking in the wrong direction. Its something totally different.
A succesful concept could be:
German engineering with Italian Design, produced in Taiwan.