But if you look at serious polls then not many young people will actually fight for this. I remember reading a number of around 15%...
And those probably don't have a high IQ.
That's a generation of people who had to never suffer the prospect of invasion and occupation of German soil by hostile armed forces. Even so, this number of willing recruits would already be much more than the Bundeswehr can possibly arm, and are unneeded as long as there is no military altercation actively involving Germany.