As a German: this very belief that Germany does not have a concept of national security or national interests and that Germany alone can sacrifice and save the world is the new form of German arrogance.
As a fellow German: yeah, that is a reasonable statement. But you could also see as a idealistic dreamer.
But also: we see permanently how it does not work.
And also: I think we have a quite elaborate way of protecting our interests. Just the tools are so complex and the plans so multi leveled that we often fail.