Netflix launched globally without taking the time to negotiate content for most countries on earth. I'm not sure you can assume that Netflix is being diligent in trying to acquire content.
Especially since even in the USA netlix appears to be pivoting into being a content creator instead of a content aggregator.
The OP isn't talking about greedy German companies, he's complaining about greedy American companies who won't let Netflix in Germany show American content to German viewers. Greedy German companies are a different issue.
This whole issue is mainly about greedy American companies, because if there's one thing that America produces that people around the world want, it's our movies and TV, and a lot of people outside the US were/are using VPNs and other such things to get access to a US-based Netflix account because the versions in their own countries didn't have all the content that the American version has, and now Netflix is restricting that access.
There aren't many people outside Germany/Austria who really want to see content from German media companies.
Then they need to maintain this barrier so that the deal is good for both the Producer and Distributor involved. If they don't force Netflix to do this then the deals don't look as good to the distributors.