Deleted member 94680
I am not sure. On the one hand, Germany is even less strong, army-wise. On the other hand (correct me if I'm wrong), Austria was not as prepared both in terms of defenses and in terms of army size, not to mention, Czechoslovakia had alliances with France, the USSR and the Little entente which Austria did not have and was overall in a better defensive position
As far as I'm aware, it didn't have that much to do with the strength of the opposition, but more to do with the international opposition to Germany's actions. Oster and the 'plotters' (Beck, von Brauchitsch, etc) weren't exactly 'Doves' but only wanted to go to War when they were ready. War pre-39 was seen as too much of a risk and even Poland and France were making some of them squeamish.
As for the strength of Heer, they might not be that strong vis-a-vis the other main European nations, but they were more than strong enough to topple the Nazis.