This is all true, but the point was whether or not the forest service needs an architect and whether or not the weather service needs a historian. Both departments serve a purpose, but perhaps some justification may be needed for these two examples. Of course, like many jobs, the title doesn't always do justice to the work performed.
I think the factor at work here is these people are NOT being hired to be architects or historians,but hired as management trainees. It's not uncommon to hire a college graduate regardless of their degree to train for management positions,because the college degree symbolizes they have the ability to work and focus,and that they aren't "quitters".
Besides,how else do you expect people with degrees in vital subjects like "art history" to get jobs?(G)