Given that almost all of the other bits screwed onto a "German" e-bike come from the Far East anyway, what part of a German Branded e-bike is actually German... apart from the excessively inflated price?...
What you write is true. Many components that sell in the hundreds of thousands can be made cheaper and in good quality in various Asian countries today and they are made there.
On the other hand you CAN find things invented and also made in Germany, for example
some very good lights (see Supernova, Busch&Müller, Supernova?), Magura brakes, the new electric bicycle horns from B&M and Supernova, Tubus racks, Rohloff gear hub, Pinion gear drives, the most expensive Continental tires, SON dynamos hubs and I'm sure man many more I do not know.
Most time this stuff is expensive or even very expensive, but in my opinion often is worth its price if you want something very good.
Of course the standard technology often is good enough for most people, that's why they sell in such great numbers.
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Here are the import and export numbers and many more, sadly only in German:
http://www.ziv-zweirad.de/fileadmin/redakteure/Downloads/Marktdaten/PK-2018_13-03-2018_Praesentation.pdf
I found it interesting that only 1% of all Pedelecs sold in Germany have been speed Pedelecs, but 3% have been electric cargo bikes.I think this is a great success for cargo bikes. (see page 18)
There has been some subsidues on them for comapnies recently, don't know if that already had impact on the numbers for 2014