A lot of you seem to be not aware how the german rating system actually works so i am going to explain it here:
It doesn't work the way that they test a game and then tell the developer what they have to change to get approved.
How it does work it that the developers cut parts of the game beforehand, because they are afraid of not getting approved by the german rating system.
So it IS completely in Bethesda's Hands whether or not a game gets cut or not, which is why i mentioned the ultimate edition of new vegas. With that edition they had enough courage to submit an uncut version of the game to the german rating system and lo-and-behold it got approved. Btw. It's also possible for developers to submit a new version of the Game to the German rating system if the previous one has not been approved. Although that takes a lot of time and it's understandable that they don't want to do this.
But why are developers afraid? Well, the german rating system also has the ability to not give a game any rating at all, which means it will land on the so-called index. Games on the index are illegal to advertise. The important part here is: Advertise. It means you can't run ads of the game in germany or display it on shelves. You can however sell it. I don't know were you got the idea that that was also illegal, Aoyagi, because that's simply not true.
In addendum, i do understand why they had to cut down the Wolfenstein game. Displays of the Swastika count as nazi propaganda in germany, which is the reason why that is illegal and it happens quite often that developers misunderstand that and think everything nazi related would be illegal in germany and cut all that out, which it isn't btw. But as i said, they had no reason to region-lock the game, because ownership of the uncut version of Wolfenstein would not have been illegal here.
So in conclusion: No this is not out of Bethesda's control, this is completely their decision if and how they cut their game. Region-locking their game is also completely their decision. And counting Austria and Switzerland as part of Germany is also completely their decision.