Well, but minutes after obtaining such license you can literally board a plane to Germany and go drive 200 km/h, the only obstacle being rental companies policies, which, if you have enough money, can be skipped. And personally, after having a license from another EU country for less than 2 months when I first drove in my car in Germany, I definitely didn't feel prepared.
There's probably only a small fraction of people with a foreign license who travel the Autobahn by car. That number might be on par or even smaller than the number of drivers with a German license who still have a poor sense of responsibility.
