True, but that was a term imposed on them based on how the German Navy behaved in WWI. They were required to give up their air force as well. Under some circumstances, such conditions wouldn't have necessarily been harsh or impossible. But the Treaty of Versailles has a lot of problems when it comes to the victors' terms against Germany (IMO anyway
I agree with everything you say, especially the part about the problems with the treaty. I was pointing out the fact to highlight that there is a historical precedent for banning certain technologies from certain countries.
As a bonus, my point also lends evidence to a theory earlier in the thread. We don't know what happened in the war, we don't even know if Earth was on the winning side.